I am running T5 TEK lights and its more then enogh light for SPS.
I have good color (pinks ,greens especially) and good growth
The key thing for T5 is good Reflector, if you get cheep reflectors you will NOT get SPS growth.
Tek light has a "W" or seagul wing shaped German made reflector, this is the one you want if you considering T5 HO lights.
http://www.jlaquatics.com/product/sl...C+6+x+54W.html
If you decide to go with MH go with 250W DE because 150 or 175 will not be enough for tall tank.
DE is smaller fixtures compare to Mogul based, also keep in mind heat issues...if your tank is in cold basement you'll be ok but if its not T5 will be your choice or get ready to buy a chiller+ hydro to run the chiller.