Nice clone Cab... I gotta build one of those too soon

Um You should go for the 400W LOL nah their pretty good thats where I got mine from and I get no problems. Mine does kick out mad heat both the light and ballast. Just be carefull its really hot I had to do the whole cool tube thing, but if you have a good space you should have no prob. I could be wrong tho, look at Puff he has a 400w and he has no fan but he has perfect Temps Good Luck