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What kind of stuff do you plan on growing? Can you afford $600 for a MH/HQI setup? Plus $150 or more per year for changing out two bubls?
If you want a cheaper route, get an Icecap 660 Ballast, buy four 65K T12 Daylight bulbs from HD for $12, get a $10 to $20 shop light pendant from Wal-Mart or the hardware store. You can grow most type of soft and LPS corals in this type of cheap florescent setup. These bulbs will only around $15 per year to replace versus ($150 in MH.)
If you buy four T5 65K bulbs instead, then you'll be able to keep most type of corals provided that you have enough calcium & filtration.
If you're still bent on spending $600 on MH/HQI w/ actinic supplememantion, please email me privately and I can try to help you out.
Look at all those live rocks on the beach at Florida's state park!