Jim,
there is more information out there than you could imagine. Just don't make any rash decisions. I've been through multiple lighting schemes on my tanks and I regret not doing significant research and making one informed, final choice. Check out RC and look around for 75 gallon build threads... I'm sure there must be quite a few. Find out what people there are using, what they are happy with, what they would change.
You say you want to keep SPS eventually. That is a good start. I would recommend either MH or T5 in that case. PCs and VHOs will give you limited success with SPS, IMO. If T5s are your thing check with Grim on RC. He is the T5 guru. As far as MHs go the options are almost limitless. If you are a DIYer you can choose almost any setup/configuration that you'd like. Pick which bulb you want, choose a relfector, choose a ballast that works with that bulb (magnetic/electronic/HQI). If you do go MH, stick with 250s. They will allow more flexibility and greater performance than 150s. If you go T5s, make sure you get the individual reflectors. I believe they put out something like 50% more par than the single unit reflector.
If on the other hand you want a pendant, they are certainly out there. They can be pricey though and don't transfer as easily if you decide to upgrade down the road. (It is much easier to rip apart a retro kit to re-use than to rip apart a pendant/fixture).
Good luck Jim and let us know what you decide to go with.
Garrett.