If you're going to inject CO2 skip on the biowheel. These are excellant at gassing off CO2, and will make it a real pain to acheive good CO2 levels. AquaClear filters are relatively inexpensive and have large areas for filter media.
I really like my Current Satellite fixture. If you went with the 1x65 watt
version you would probably have pretty close to high light
and would be able to grow most anything you want. Just make sure to swap out the bulb for a full daylight bulb. If you want to be able to grow absolutely anything you could put in the tank, you could splurge for the 2x65 version
and use a daylight and 50/50 bulb. This would get you into Very High light territory.
Either one of the fixtures I suggested would require the use of CO2 as well. While you could go with Pressurized CO2 if you want, DIY CO2 would be very manageable on this size tank. If you go with the AquaClear filter you can even use it as your diffuser.
With this much light you'll also be looking at the full compliment of fertilizers: Nitrates, Phosphates, Potassium, and a good Trace Mix. You could go with the Flourish line or dry ferts from Greg Watson
. Both are good options on this size tank, although dry ferts are definately much more economical in the long run.
Sounds like a facinating project, definately post pics when you get it set up!