That is good wattage, but without the VHO, 3x175 would be a little low for a 125g. 3x250w with VHO actinic supplement would be better.
But I agree, you will be able to keep any sps anywhere if the VHO are 10k daylights.
Also, look into the Iwasaki 15k 175w bulbs, as they are the highest PAR 175...