SmashDeveloper, Smashing Magazine frequently has round-up articles about best designed… (http://www.smashingmagazine.com). I personally would tell you to avoid looking too much at what other designers have done and encourage you to do your own thing. There are some great websites out there, but so many look the same and fail to stand out. One thing that I think is nice, and have been meaning to add myself, is a contact form and online quote.
if your looking into inspiration i reccomend you pick up a copy of The Web Designers Idea Book by Patrick McNeil it has tons and tons of website examples sorted in many ways. I think he also has a website designmeltdown.com where he might post some stuff. other than that you could head over to themeforest or another theme site and look at dark styles there