Yeah, Drs. Foster & Smith has the Nova Extreme 24" x 8" T5 fixture (4 bulbs) for $149.00...I think I'm gonna go with that one.
**Edit**
Actually, for anyone else interested, I just found (and ordered) a Nova SunDial T5HO fixture from marineandreef.com for $183.00 with free shipping. Same thing Marine Depot has for $219...not bad.