Just a couple of things I wanted to mention - sound's like you're aquascaping. I'm sure it will be a beautiful tank.
The gravel seems a little large sized, like my gravel. I think that my gravel is ok, but it would be better if it was smaller, or maybe capped with something else.
I have a 10 gallon planted tank that I'm lighting with 2 13 watt CFLs, and they're bright. I have them vertically oriented in "brooder" dome reflectors, as opposed to your horizontally oriented CFLs, which may account for the difference in wattage used on the same tanks. Vertical orientation of spiral bulbs is optimal. I would keep an eye out for the first sign of algae - I have Cyanobacteria (BGA) after running for a year, and had a terrible bout with hair algae several months ago. If that happens, cut the photoperiod and raise the lights higher or lower the wattage or use a 60% window screen light filter.
I think that we are running tanks that are pushing high light with very little CO2, and plants only photosynthesize, in our case, as long as there is CO2 left. All the rest of the light energy is open for the use of algae (ugh).
I also want to add that when I wanted to put a pair of rams in my tank, I was advised to get a bigger tank. Just something someone told me.
All the best,
MY TANK: Planted 10g; 2 x 10W CFL; Fluval U2 internal filter; MGOCPM/black sand cap
A Silent Cycled Tank
started April 18, 2012