I have a rainforest 66, 6, 6 in pots using a vortex sprayer. Kicks ASS! I also have a 2x4 ebb/flow system which is great! I use a waterfarm for my mother, and since I usually have a few spare clones around, I throw them in soil to fill in the voids in my room. I have 5 soil and the 66 in flower right now with the ebb system vegn. =) I just use flourecents for veg and a 1000hps for the bloom. I've seen the t5's and they are nice, but they end up using the same amount of wattage as the 400mh. I would only get a t-5 if I had a small space or can't handle the heat of the 400.

It's all damn fun anyway you go.

good luck my friend.