Welcome To Bike Forums, Psy!

I think that the Marin Muirwoods 29er is a great choice for a commuter. That's especially if you're buying it at REI, because of their 100% satisfaction guarantee. If you become a member and something goes South with your bike, say six years from now, you don't even need a receipt in order to either get a full refund, or an exchange.

At REI's current price of $700, the Muirwoods 29er just can't be beat!

Good Luck!

PS.

At your height, you might even enjoy the Muirwoods 26er, as well!

The Marin Muirwoods 26er ~ $630
www.marinbikes.com/2012/bikes/specs.php?serialnum=2207

* Try them both just to be sure of the optimum comfort level.