It's worth picking up a G3 accelerator for these systems, too, with 512k or 1MB of cache. I would not recommend overclocking - at 80MHz, the CPU bus and the 10MHz Nubus are nicely lockstepped in timing, which according to reports helps with performance when using Nubus cards.

With a Sonnet G3 (and video extender ribbon cable), you can use an HPV PDS card for video, which is faster than motherboard video and keeps traffic off the Nubus compared to using a Nubus video card (though you still lose a Nubus slot due to space issues).

Sonnet may still have the Crescendo Nubus G3 400 and/or 500 in their store.