If A2/3 5.9/10 is what you're looking for, then I'd say you've got a lifetime of climbing around here. For cragging I'd suggest hitting up Index(1.5hrs) and Icicle Creek (outside of Leavenworth, 2-2.5 hrs from seattle). They are both granite. They both rock. Index is a really steep cliff, with not all that much below 5.10, and plenty of aid possibilities. Icicle Creek, is a huge valley full of granite as far as the eye can see, with crags dispersed throughout. For some even more impressive cragging, drive up to Squamish, B.C., the little Yosemite away from Yosemite. It's about a 4hr. drive. This place has huge. Big walls. little walls, you name it. And it's all granite. You couldn't climb all the stuff in a lifetime.
Those are the best crags around here for what you're interested in. But then you have all of the alpine climbing in the cascades, and there's just way too much to list here. One place in particular that you might want to check out, though, is Washington Pass, on Hwy. 20 in the North Cascades. It's alpine climbing, but really close to the road, so it's almost like alpine cragging. Again, it's all granite (I'm totally biased and fully admit to that) and there are peaks and spires all over the place. The Libery Bell group has tons of stellar routes, both free and aid, as do the Wine Spires (Burgandy, Chianti, etc...) up by Silverstar.
There you go. A lifetime of climbing. Enjoy!