I have a 72g bowfront with 2x250mh and 4-65w pc. My house is air conditioned and I do use fans in addition but even though growth is very good so far, if I had to do it again I think I would use a nice T5 assembly.
I still may switch my mh over to my 90g and put a T5 unit I recently ordered on my 72g. Hope this helps..As for used equipment, check out the usuals, Buy+Sell..Craigslist..Ebay..
