Which bike??? Jamis, Kona, Raleigh....

I have been debating back and forth for about 1-1/2 weeks now , so I decided to get other opinions. I have been out of biking for a number of years now, and have tried hard to get as current as possible on good equipment (through this site mostly). I have narrowed my choices down to 3 options.

1. Jamis Exile (2003 model)--$499
2. Kona Blaster (2004 model)--$599
3. Raleigh M80 (2004 model)--$509

I mostly do gravel trails, but am looking to really get into some single track. I rarely ride on paved roads. Stability will be an issue when I get to single tracks. Minor parts like tires are not as much of a factor. Mainly frame, shock, braking ability & upgradabilty.

The Jamis looks like a really good deal, since normal retail is between $599-$659. It also seemed to have better components than the Raleigh. I've considered the Raleigh due the fact that it has disc brakes and I can upgrade later to the Avid discs.
I feel it is really between the Kona and Jamis, but I haven't really heard a lot about Jamis unitl recently. Anybody else have experience with any of these or all of these bikes? Your opinions will be much appreciated. Thank you.