My Rush is a 4.3" travel bike at 27lbs with all XT components. It has been my favorite bike on just about any trail (some of Boyette I'd prefer with a HT). However, I started wanting something for doing the harder options at Santos, and built up the Uber-V. It's a 6" travel bike at 30lbs, and it could easily drop down to 27lbs without sacrificing strength (just $$$).
If I had to do it over again, I'd have spent the same amount of money and bought a brand new Maverick ML8!