Doesn't mean I'd use the PPC card, it'd be there in case I want to run something that has PPC only code. Alternatively I could put a DOS card in PDS slot but only 1 DOS card exists that fits there and it's sized to fit PMac 61xx. The extender board is fairly hard to find. Like this one: http://www.ebay.com/itm/131320786722 not mine, do note the missing 486 CPU and cable, and assume the DOS card is bad. The DOS card and extender may be easier to get than Orange PC Nubus card.
As for killer sound card suggestion, it won't work for me. Being deaf, even with hearing aids I couldn't tell the difference between killer sound card and high end speaker system from onboard sound and a $10 speaker set. Heck i couldn't tell if a music being played is genuine Beethoven or a 3 year old banging on a few frying pans.