Good morning John,
I think looking down the I-90 corridor is a great idea. Commute times will be based on what time you leave in the morning and what time you head for home, but as a long time resident of Klahanie, and a person who commutes to downtown Bellevue daily, I think anywhere from Eastgate to Issaquah is good. I-90 seems to be the better freeway out of the three. Great neighborhoods to consider are Issaquah Highlands, Klahanie and Trossachs, but there are other great communities on the South end of the Plateau as well.