Redecorating a "bedroom"?

I say 'bedroom' since it's a studio, pretty much I'm redoing the whole place and am tackling my bed at the moment.

Problem is I can't really think of any stores that sell bedding stuff besides like Macy's, Target and Bed, Bath and Beyond. I even checked out Nordstroms and didn't see much (plus while I do plan to drop a few bills on bedding I'd rather NOT spend $600 or $700). I'm leery of buying off overstock.com since I can't actually see or feel the products (bought some sheets off there a couple of years ago and was disappointed, great for like 3 washes, then awful and they weren't cheap).

I'd say my budget for bedding is around $400 total, sheets, down blanket and duvet and a couple accent pillows. I'd like something really nice and luxurious, puffy and comfy. Pretty much, I want a bed no one wants to ever get out of.

Any ideas for stores where I could find a LARGE selection (I still haven't made up my mind on what I want and so I'd like to see a lot)? If it helps I live in San Diego. Also, I'd love some decorating ideas, I'm thinking white duvet and maybe dark plum colored sheets? Nothing overly girly, more classic than trendy.