Fluoro tubes make no sense to me at all. I used fluoro tubes on my first grow, luckily I didn't really have to invest anything in them because my brother had a ton of lights hanging around. The problem is in the effective lighting area. You have to keep your lights ideally 2 inches or less from the plants to be in the optimal range. If you are scrogging then maybe you can get away with a t5 and get some nice results. The other problem is in the price, a nice t5 set up will run you as much as a used 400w HPS, and the 400w will crush the fluoro tubes in terms of efficiency over it's life. The lumens per watt ratio for HPS is around double the fluoro.
I think if you are going to go with fluorescent lighting that CFLs are the way to go. They are by far the lowest in terms of initial cost. If you are doing a micro grow then CFLs are great. If you want to run fluoros for whatever reason then great, just don't be one of these guys that comes out bashing HPS lighting when it really is still the best all around grow lighting available.