Not trying to undermine amdj by any means... but if you try the HighEnd Trackspot, they are definetly a champ... I have 4 of those, 16 Swivel Beams, 4 RoboScans, 8 Rainbow 250s, 60 pars, 4 color 150/dmx... I'm in about a 7500 square foot dance room and the Trackspots work great for that long throw effect... as for the 575 and 1200w lights, various companies make those... Highend, ******, older amdj, etc... when you get to 1200w you're looking at prolly going 220v so beware...
-DJ Jared D