The FT-897 is a great radio... it's my primary base rig. I'm sure you will enjoy it.
As for accessories - I just have the LDG AT-897 antenna tuner, a Signalink USB sound card interface for PSK31, G5RV Jr. HF antenna, 2m / 440 antenna, Yaesu MD-100 desk microphone, LDG Meter, and CAT computer...