Frankly, I wouldn't just consider location based on where you currently work. Things change and who knows, you might start say at QC and end up at Broadcom with an additional 25% payraise and double promotion, like they've been doing to steal QC employees away, or you might join a startup. I would say most tech companies are in the burbs, in sorrento valley or in rancho bernardo area.
Areas you should check out i think would be
Rancho Penesquito, Poway, Carmel Valley, Rancho Bernardo, 4s ranch, etc. There's newer communities along 56. These areas aren't cheap (yet). But at least you can compare and figure what you "want" when the time is right. Also, if you start a new job, generally you want to give yourself some time to settle. After all, you can find out that you absolutely hate it there and want to do something else (like has happened to me in the past).
