I found the 2211 on eBay. It was a toss-up between this canister or a Zoo Med 501. After a lot of reading I decided to go with the Eheim because of the generally positive reviews.
This is my first canister ever (all previous filters I've ever had were Aquaclears). I was pretty nervous at first because the many connections had me worried about my hardwood floors. In the end I went with it anyway because I figured it was a small tank and I hated the look of the HOB (it looked like a third the size of the tank). The streamline look is the reason I went with the in-line heater as well. I wanted a minimal glass tank with as few visible equipment as possible.
I was hesitant about the 200W heater being overkill for 4 gallons as well, but from what I've read from people using it on their nanos, the thermostat on the unit is decent and there haven't been any overheating problems. Plus, I have it set on the lowest temp since I find that the CF light fixture alone provides enough warmth to heat the water to around 76F (the heater is mainly for the winter when the room temp is much lower).
Installing all this was definitely a new experience for me. Like I said, I've never had a canister before. The instructions that Eheim provided were basic to say the least (it's good if had an interest in learning different languages, bad if you are a newbie like me). The hardest part was priming the thing. Eheim suggested either buying a suction starter (for $$$), buying the deluxe intake tubes with a dedicated hole for priming (even more $$$), or sucking the water with your mouth and pray that you you won't get a mouthful of tank water, Luckily for me, the filter pretty much primed itself. All I had to do was toggle the control valves on and off. It was pretty loud for the first 30 minutes or so but it eventually became whisper quiet.
As predicted, the flow from this filter puts my Aquaclear 20 to shame. Between the filter's stronger output and the vortex action created by the lily pipes, hopefully the problems I've been having with surface scum and detritus collecting on the plants will be gone. There's also about 5 times the amount of biological media on this filter compared to the HOB (this is a good thing because I've just discovered that a local LFS has dwarf cories and I'm trying to fight the urge to get a few).
As for the pipes, they look quite attractive. However, I just know that they won't stay this clean for long. Cleaning it won't be a fun job.
Here are the pictures. There are micro bubbles on everything because I just did a water change.
Close up of pipes: (no idea why the water looks so yellow)
I also put in a drop checker. Until I've decided on the which pressurized CO2 equipment to get, it's just going to be used with DIY for now.
Here's a little video
showing the whole tank and the water flow.