i have a 125 gal tank with 4 seio 1100's and 2 mj 1200's one 300gph pump for my uv sterilizer and a 700 gph for my chiller. is this too much or too little for a reef tank with some sps corals planned? want to make changes while cycling if needed.

yep, that should be enough for your system, just make sure it "mixes" the water, instead of having constant "flows" you dont want corals subjected to hard unidirectional water flow all day/night, hope that makes sense.

if not see this podcast for more info
http://www.talkingreef.com/forums/showthread.php?t=149