Thanks!
Those will look super and TSW does have a lot of offsets to choose from.
1&2) These BFG comp g-force 2's are a great supercar tire for performance for summer. They've just been released, and were amazing in terms of price---really, really good! I use my 19's for snows now, and wanted a dedicated summer tire. As such I wanted it to stop better and corner, just plain do everything better than winters and all seasons---No compromises. And they definitely do---the car definitely stops better, corners with no howling, and less traction-control interference on quick acceleration (even in the rain). Even my wife noticed that (says a lot actually-lol). And all in all a safer tire.
However, I guessed wrong in terms of road noise. It appears that more cut treads, and nibs and stuff that I thought would make noise, actually doesn't necessarily. It's way quieter than my winters (Pirelli sottozero's actually), but not as quiet as the Michelin Primacy's that the SE came with. So good all seasons can be quieter. Don't get me wrong the BFG's are NOT too loud at all---I am just pretty picky. But I was kinda surprised here, cause 'quietest' was a goal too.
Also if it matters
(and it does to me 
) tread pattern and sidewall look sick. Even guys who don't know much always say "the rubber looks siick" a lot.
3) Adding them to my summer set was gonna be $300-400. Most live with the light on especially like me having OE's with winters. The yellow indicator is small and not intrusive. Because you're in Cali and these may be your only set of wheels, I think you could use reuse your old ones (not totally sure tho).