Wow well thanks for all the replys guys I really have something to think about now. I'm think i'm leaning towards the 1000 watt and maybe just building a cab about the same dimensions as a c-22 a but deeper. I think they're only about 20 inches deep. I could go with a 600 watt and extra cfls like i'm doing now but in all reality after all that it's going to only save me an extra 100-200 watts instead of 400 so why not just get the 1000 and save all that extra space for the plants??? Another question. Is a cooltube better, worse, or about the same as a vented hood in terms of keeping the temp down??