Bogus has a pretty crappy park setup, yeah.. but from what i hear, they're going to step it up next year. What that means? Who knows... but either way, its a decent mountain with some pretty good steep shots, good trees, and decent snow - least it was when i was out there. Plus its 30 minutes away from town, so you cant complain too terribly.
Brundage and Sun Valley are legit though. Brundage is sick, and gets great snow... and Sun Valley, though I actually have never skied there, seems like a pretty awesome place, and isnt TOO far from town.
Also, Boise isnt all too far from Hood, Tahoe, or SLC if you ever want to make trips during the wintertime... so its not a bad spot by any means.