Fans should do the trick. I have 925w of lighting in my canopy which includes MH
's and VHO
's. I have a Ranco dual stage temp controller which turns the fans (and heaters) off/on at set temps. As long as the room temp is below 80, I can easily keep my tank at 80-82. If the room temp gets over 80, I have the house AC
on and the fans easily keep the tank at 80. I have fans in my canopy and also a fan over my sump.
For your lighting I would highly recommend using 2 Lumenarc Mini reflectors
mounted about 18" above the water using 250w bulbs. You will get full coverage of your 60" tank using those reflectors. You can also check out my build thread where I made my own Lumenarc reflectors.
Check out Ballast Wise
for ballasts. 250w electronic ballasts are $80 each.
Depending on the MH
bulb you use, you may or may not need supplemental lighting. I personally like VHO
actinic supplemental lighting, but you can get a T5HO electronic ballast
to run 2 48" 54w bulbs from BallastWise for $30.