for the money, i would say you cant beat pioneer. its got solid sound, lots of options and decent price. the DEH 6400 is a really nice deck if you can find it in your price range. you should be able to get it for about 250$ without too much trouble. some other nice things it has are built in subwoofer crossover/controls, nice bright display, remote, 50Wx 4 power, etc. the radio reception and cd sound are both pretty nice too
thats what id suggest
also, hate to say it, but i havent been happy with the reliability of kenwood decks in the past. too bad, i like kenwood, ah well