6x7 sauna conversion

I'm converting a sauna and need some advice. I bought a hydrofarm 600 hps digital ballast and hood and an agrofarm bulb. I want to yeild as much as possible and intendend to expand the op later. I have the room hooked to ac. Here's my question. Do I rock 2 600's, or 2 1000's. Can I do a 600 and a 1000 simultaneously or is that a bad idea? Originally I was thinking 2 6's because of the size of the room and heating issues but I want to expand later and feel I can get more weight with 2 thowies.

Peace and Thanks.

idk but god damm and good luck nukka

2x600 would work fine, but 2x1000 will work better 99% of the time. if you can handle the heat from 2x600 you can prolly handle 2x1000 or 1x600+1x1000 without changing much. and with 2x1000 you can expand you grow later. but if cooling is a concern cool tubes are easy to make and way cheap.
you said your running A/C into the room and that will help with the humidity, but depending on what type of grow your doing you may want to keep a eye out for mold with a room that small. hope this helps