first off, let me start by saying i might be slightly biased because im going to W&L. have you visited either school?
As far as rankings go, W&L is ranked 5 spots higher than Univ of Washington, but its not really that much of a difference. I dont know much about Univ of Washington, but I do know a bunch about W&L. W&L boasts a low students:faculty ratio, beautiful campus, 93% bar passage rate and high job placement. However, I guess the biggest drawbacks of W&L is the location. Lexington is really tiny...there isnt really a nightlife and the Virginia Military Institute is right next door. However, if quaint living is your thing vs. big city life, Lexington can be great and really friendly. Plus, its ridiculously cheap. The only other drawback for W&L is that they primarily funnel into firms in Charlotte, DC, NYC and down South. If you want to practice anywhere outside this locale, you might have a slightly more difficult time securing your dream job. However, as the 25th best law school in the nation, I really dont think it would end up being too detrimental.