I love my D90! I bought it new right after they came out.. can't live without it.
Be sure to check out the Vivid color setting, works wonders compared to the older models
As for RAW images, I use Light Room and CS3 (I know, I'm behind on the times, rofl..). If you can find Light Room on the cheap, it's absolutely amazing for editing by itself. If you're like me and take thousands of pictures.. it also makes it a lot easier for sorting/uploading/formatting.. so on.
I love taking pictures, though I don't seem to get as many of people.. less so when you're dating someone that hates having pictures taken of them.