I also live close by, up the I5. I've been running 19" Dunlop Wintersport 3Ds for 2 seasons (235/255 stagger), and will be switching to 19" Blizzak LM60s this season (with 255/275 stagger) on my OEM 220s. Just ordered them today from Tire Rack, $1272 + shipping.
I'm not in the mountains all the time, so I'm not concerned about staying on the skinny side for snow traction. If I was, I'd stick with a 235/255 stagger.
2011.5 E90 Dinan M3, SS II, M-DCT, EDC, M Drive. Winter setup 220M w/ 255/275 Blizzaks
Performance Mods: Dinan St.1 suspension, exhaust, intake; TTPs; BPM St.II, DCT, servo tunes
Cosmetic Mods: OEM CF splitters, mirrors, center console, spoiler; Arkym CF diffuser; LUX; tint