Look at this:

http://www.outdoorresearch.com/site/nighthaven.html

It's made by a PNW company, has insect protection, is quite spacious for a 2-person tent, and weighs well under three pounds.

BTW, most of my time camping in PNW has been while mountaineering. The comment that it rains in the Olympics a lot is quite incorrect during the summer season. The climate is for all practical purposes the same as in the Cascades.