another good boot, no problems whatsoever today. everything working, sleep, speedstep, audio (digital as well), feeling pretty good about it now!
I can't decide whether this will be my final working OS, it's on a 64GB SSD which might not be enough capacity for app support files in the future, but I've backed it up with superduper for now.
thanks humph, Lnx2mac, and everyone who posted - and of course tonymac
Things I can suggest for others who are thinking about a build:
avoid using older stuff- I used a first gen SATA DVD burner that was a nightmare, would only be recognized as an IDE device - swapped it out for a new one and the install process went smoothly.
research what other have built, and try to get the exact same parts - vendor approved parts are a good start, but check to see if the combination of parts is working in the wild wild world of hackintosh.
once you make your purchases, work fast - the clock starts ticking on your return window as soon as you pay for it, if you wait too long and discover bad or incompatible hardware you don't want too be stuck with things that don't work.
this is just my experience as a relative newb, of course YMMV depending on how advanced your building/tweaking skills are.