I think that if I wanted the best Quadra 650 I could build for general use in System 7, here's what I would do:
Sell the PPC card unless you really need PowerPC... it's not optimal for running System 7.
Get one of the NewerTech 50MHz 68040 upgrades
Max out the RAM
Get a SiliconExpress IV or a JackHammer SCSI card, hook it up to a 266x CF card on a IDE->Wide SCSI adaptor. A 15,000 RPM hard drive would probably provide comparable performance at a much lower price... the 18GB Cheetah 15K.III is fast, cool, quiet, and quite a bargain on the used market.
Replace the internal CDROM with a CD-RW
That leaves two NuBus slots you can use for any specialized tasks you might want the Quadra to accomplish. If you don't have any specialized tasks in mind, I'd put a nice video card and a 10/100 network card in those slots.
The Radius LeMans GT, VillageTronic MP520 or MP540, RasterOps PaintBoard Prism GT, and anything with "Thunder" in the name are all pretty good choices for fast, high-resolution video cards for System 7.
The end result would be a truly, excessively fast machine to run any version of System 7 you wanted. This is probably going more overboard than what you really had in mind, but I hope you enjoy the thought.
Sell the PPC card unless you really need PowerPC... it's not optimal for running System 7.
Get one of the NewerTech 50MHz 68040 upgrades
Max out the RAM
Get a SiliconExpress IV or a JackHammer SCSI card, hook it up to a 266x CF card on a IDE->Wide SCSI adaptor. A 15,000 RPM hard drive would probably provide comparable performance at a much lower price... the 18GB Cheetah 15K.III is fast, cool, quiet, and quite a bargain on the used market.
Replace the internal CDROM with a CD-RW
That leaves two NuBus slots you can use for any specialized tasks you might want the Quadra to accomplish. If you don't have any specialized tasks in mind, I'd put a nice video card and a 10/100 network card in those slots.
The Radius LeMans GT, VillageTronic MP520 or MP540, RasterOps PaintBoard Prism GT, and anything with "Thunder" in the name are all pretty good choices for fast, high-resolution video cards for System 7.
The end result would be a truly, excessively fast machine to run any version of System 7 you wanted. This is probably going more overboard than what you really had in mind, but I hope you enjoy the thought.