I did a few races on a Classic Blur in 05.........notes:
The sizing, even on a large (I am 5'11) feels a little short in the top tube with a 100mm stem and layback post.
Pedal bob is minimal
Suspension is awesome....slam in/over/through pretty much anything
Actual Weight: 6.5 lbs ano frame w/RP3
Now....the classic Blurs are no longer produced (you could probably find one new if you tried), so you would be looking at a Blur XC. Medium Ano frame actual weight 5.5 lbs, and a longer TT length as well. I can only assume this would be a great race bike. My Blur took me to the podium in sport class and was capable in expert, if heavy (about 28 lbs fully built w/full xt including 765 tubeless wheels).
That being said, if I was buying a pure FS race bike right now, there is no better value than the Giant Anthem 1. The Anthem 2 is also nice. Took a demo on a short road ride and it just felt fast.