Relo questions: where do you buy electronics?

Where do Seattle residents go to buy electronics? I don’t mean TVs and GPS’s; I’m thinking of power supplies, DRAM, heatsinks, and so forth. (Yes, I know I’m joining Amazon – but some things require browsing. I’m never going to buy a mouse or a keyboard without getting my hands on a physical example.)
When I’m in Silicon Valley, I tend to visit Fry’s, Microcenter, and the Apple store. I see that there’s a Fry’s in Renton, and an Apple store up in University Village….
Anyway, where do the local geeks shop?