If I wasn't invested in the Nikon system, I would seriously consider a K-7. Very good camera for the money, and every feature under the sun.
As for accessories, get a nice bag that's doesn't look like a camera bag. Manhattan Portage makes some bags that can be easily outfitted for camera use with some Domke inserts. I have a Manhattan Portage West Side bag (~$70) and love it. It's tiny, but I can manage to fit a netbook, an SLR with attached prime, a zoom, a travel book, a flash, a bottle of water, and some small accessories. Can probably squeeze a third lens in there if I needed. (~$90)
I would also get UV filters for you lenses and get rid of the lens cap, but that's a personal preference. You can get cheap/good UV filters from B+W on ebay. (~$20)
A tripod would also come in really handy depending on how/what you want to shoot. For a very cheap and compact monopod, get some string and tie to your tipod screw mount thing. ($1-$100)
Other than that, I'd pick up some photography books/magazines. Let me know if you want some suggestions there. ($50)
That's how I think I'd spend my first $150-$200...