That's a very nice bike. I have the exact same model, bought off ebay just 2 years ago from the original owner, a pro racer. Best £130 I ever spent ($200).
All stock parts, Shimano STX RC, Parallax hubs and Guru rims, except for tyres and tubes. It even has a STX headset that my LBS had lying around.
Had to change the brakes over for use in England (left rear). I use it for commuting to the station but absolutely love it. Like yours mine polishes up very nicely but I sadly have to leave it grubby to deter thieves as it's parked up all day.
I still ride trails on it and it's just as fun and quick as my FS Kona, probably because I started mtb-ing on a Trek 950 in '93.