Coolio, based on your commute description you would probably be better off with a Hybrid or a Mtn bike with a lockout for the front suspension...

Take a look at these options:

Shimano XT 27Spd Front Suspension Bike 2010 Motobecane 700HT $499.95
New LockOut Rockshox Fork, DiscBrakes, Truvativ Cranks, Advanced Al Frame

http://www.bikesdirect.com/products/...700HT_2010.htm



Shimano Deore 21Spd Comfort Bike 2010 Motobecane Jubilee Deluxe DLX $349.95
Advanced Lockout+Adjustable Suspension Fork, Comfy Suspension Seatpost, Adjustable Stem

http://www.bikesdirect.com/products/.../jub_dlx_x.htm