I'm a roadie looking to to ride at night without trashing my expensive skinny tires in the dark; a little off road riding as well (can't say mountain biking honestly--I'm down in Houston). I'm 6'4" and ride a 63 cm.
road bike, so I'm figuring a 21 in mountain bike--that cuts down the field a little. I've looked at the 3 bikes above -- anybody got any opinions about them? I'm about 230 (on a good day), so durability and shock life may be an issue.