I will be running CAD applications on this machine aside from learning Final Cut, so it seems the quadro is a better choice than the geforce 7800 gtx evethough the latter is faster.
And besides I really wanted a quieter machine.
I think he was talking about the 7800GT, which has that tiny, dinky single slot fan that blows the air back in the case, and was the only 7800 that was officially licensed and made by Apple.
He probably hasn't owned the 7800GT
X, which AFAIK is the same exact cooler as the Quadro, so would be just as quiet and appreciably faster, and can only be obtained in the form of a flashed PC card, unless that's incorrect? But that's the cheapest way to get them and work just as well as any that would have been (or maybe were) made or licensed by Apple.
Either way, the 7800GT *X* would be, by far, the best choice IMO, unless you find the Quadro for a far better price than what the GTX can be had for.
And VanneDC, you have a G5? It's not in your sig.