While Renton is thought of as an unsophisticated backwater, it does have some really good eateries worth the drive from Seattle. many people know about Jubilante and her fine Italian sister Gene's, but few know about Chuy's on the Maple Valley Hwy just past downtown Renton. Chuy's primarily specializes in Mexican seafood, which is very fresh and unlike other Mexican restaurants(i.e King Salmon and Halibut tacos).
The place is very casual, small, and more like a urmet tacqueria than anything else.
Another unique Renton eatery is the Japan Thai restaurant project, next to the Renton civic theatre in downtown renton on 3rd. They do both japanese and Thai, and do both well. Owners are a Japanese man and his Thai wife. Prices are extremely reasonable, and great things include Thai crispy spring rolls, Japanese Miso soup , Salmon curry(thai)or salmon teriyaki.