Downtown Seattle: Besides
Nordstrom, Mario's, and Barney's?
Sway and Cake. It's right next to
Nordstrom, one of the best boutiques.
Sway & Cake - Issa - London, Lily McNeal, add
David Lawrence - Versace, D&G, True Religions, etc
Butch Blum - mostly men's stuff.
Jerri Rice - various designers, great boutique!
Blackbird
Riveted - sells only jeans. Lots and lots of really nice jeans.
The Zebra Club
I'm probably forgetting a bunch of places, but that's off the top of my head.
If you go to University Village, the only place worth stopping at is Mercer. Carries stuff you'd find on
shopbop.com.
Don't bother going to the Seattle Premium Outlets. It's crap and not even that good of a deal.
If you can make it to Bellevue, stop by Derek Andrew. That's also a nice boutique, but nothing you wouldn't find in Seattle.
PM me if you want more info.