The Lahaina Grill is really good. I like this review here (lots of pics): http://www.paradise-found-in-maui.co...ina-grill.html
(It also gets awesome reviews on TripAdvisor)

Also, upcountry's Haliimaile General Store is really nice... enjoyed that one a lot too.
http://bevgannonrestaurants.com/haliimaile/