I have owned all but one of the pumps on your list so here is my opinion on them and my opinion on pumps on your list in general.
First of all, external pumps that are fan cooled are cooler than air/water cooled pumps of the same GPH, if you can even find an air/water cooled pump that will achieve the same head requirements.
Second, fan cooled pumps are loud (the fan itself is), where as air/water cooled may not be. If you already have noise such as fans blowing on your lights, then the added noise level of the fan cooled pump may not be as noticable. Lots of noise in general with a reef tank for example, is why reefers may say that they don't notice their Iwaki 70 being "overly" loud. However, some pumps vibrate more than others which can add quite a bit to the noise level.
Third, the bigger the volume of water that a pump is run on will generally relate directly to how much the water temperature is effected, so you may want to pay close attention to what size system I write that each pump was run on.
Mag Drive Supreme 5
500 GPH 1/2" 1/2" 10.5' 45 Watts
Mag-Drive Supreme 7
700 GPH 1/2" 1/2" 12.5' 70 Watts 5.0" x 3.8" x 4.2"
Mag-Drive Supreme 9.5
950 GPH 3/4" 3/4" 14' 93 Watts 5.0" x 3.0" x 5.5"
The Mag 7 is notorius for locking notorius for locking up after power is cut off and then on. The one that I had did this. It also vibrated (increased noise) and added about 2 degrees to my 58 gallon tank with a 20 gallon sump. IMO this make of pump has inconsitent quality, I will not own another. Now, keep in mind that a zillion of these have been sold over the years for aquariums and ponds both, and some on the boards have reported they have had good luck with them, but I have found that the majority of reef people who have run them eventually look to change to another brand.
635 gph 1" 3/4" 12'1" 65W 8.6"x4.6"x6.3"
900 gph 1" 3/4" 11'6" 80W 8.6"x4.6"x6.3"
Good quality pump with low noise level. I run this on my 180 gallon with 50 gallon sump and have noticed no additional heat. Don't know without further research if this pump will give you the results you are looking for with the injector.
Quiet One 3000
780 gph 1" 1" 10.50' 40W 4.25" x 3.75" x 4"
< 45 decibels
Quiet One 4000
980 gph 1" ¾" 13' 50W 6.25" x 4.25" x 5.25"
50 Watts or 120 Watts? (120v/60hz) .79 amps
Never owned one but have read countless posts of people unhappy with the noise level, as well as the quality of the pump in general.
Iwaki with american motored (does not come with power cord)
IK1225 540 gph 1" 1" 8.2 11" x 3.5" x 4.9" .42 amps
IK1233 510 gph 3/4" 3/4" 17.7 11.9" x 3.5" x 4.7" 1.0 amps
IK1235 960 gph 1" 1" 13.5 12.1" x 3.5" x 5" 1.0 amps
IK1243 750 gph 3/4" 3/4" 21.3 11" x 4.4" x 4.75" 1.9 amps
Famous external pump that many large tank owners would not trade for any other pump. I would not recommend this pump for a small system due to high heat and noise levels, and in fact, would not recommend to anyone unless they have a way to deal with the heat of the larger Iwakis. I ran an Iwaki 100 on my double beckett skimmer and it increased the water temp of my 180/50 by about 4 degrees.
ps2 650 gph 3/4" 3/4" >25 ft 98 Watts
ps3 800 gph 3/4" 3/4" >25 ft 140 watts
<30db normal for pump to increase the water temp by 4–6°F
This is the return pump I run now on my 180/50 planted tank. Very good quality pump and quite powerful. Noise level is practically zero. Heat transfer.....2 to 3 degrees on my system. This pump is an external, but has no fan (this is the main reason for the low noise level), it is water cooled.
Panworld (Iwaki knockoff and comes with power cord)
50PX 590gph 3/4" 3/4" 16.5' 90W 10"x4"x5"
100PX 790gph 3/4" 3/4" 21' 120W 10.5"x4"x5.5"
Quieter than iwaki equivalents 30RLt and 40 RLT
I have run both a 100PX and the biggest one they make (equal to an Iwaki100) and was dissapointed with the quality. The 100PX is very good on heat transfer (at most 1 degree on my system), but the vibration and fan noise are really bad. I did a fan modification that I read about on Reef Central and this did help the fan noise itself, but the vibration caused a hum in everything it touched. Talked to the head PanWorld USA guy and got the typical "you are the first person I have heard of with this problem"
I am currently running an Oceanrunner (what nate linked to) for my CO2 and have been very happy with it. Very low noise level and no heat increase on my 180/50 system. Again however, without doing more research I don't know if this pump will have the head to do what you are looking for.
You also may want to look at the Sen pumps too. I haven't owned one but the majority of those that have seem to be happy with them.
...that's all the typing I can do in one sitting, but I would be happy to help you with any further questions or anything I may have left out.