As a commuter bike, I think I would prefer the base Langster over the Comp for a few reasons.

Brakes
- Jeez, I can’t tell you how many times they have saved me from certain doom. Even now that I’ve learned how to skid, I still use them more than pedal resistance to slow down/stop. P.S> Be careful skidding when good looking girls are around. I've launched myself into the air a couple times.
- I ride on the hoods ½ the time. It is nice to have one for each hand.

Fixed/SS
- The base Langster has a Flip/Flop hub so you can put a bigger cog on the SS side and use it as a bail out gear if your tired, have hills or riding into the wind. I’m not positive but I believe that the Comp is Fixed only.
- A back brake is needed to ride a SS safely IMO.

Bottle cages
- It’s nice to be able to simply reach down to grab a drink. You could attach bottle cages to the Comp with hose clamps but that would be fuggly.

I like the 2006 base Langster geometry because it is very close to my road bike. Handling is snappy but not twitchy. I love it. I have not toe overlap whatsoever. The wheels are great. At 180+ lbs loaded up, the 32 spoke double wall rims have been as true as the day I bought the bike after 600 km of rough commuting roads, rail road tracks & curb hopping.

Maybe you should look into Grasschopper’s generous offer. Although the 2007 Langster has some better components (carbon seat post, carbon fork) the geometry is too relaxed for my liking. I don't notice the difference in the ride quality between my 2006 Langster & my road bike that has a carbon fork & seat post. The drive train of the 2007 is geared too low. It is less expensive to get a bigger rear cog on a 2006 for the time being until you get stronger than to get a larger chain ring on the 2007. Besides, the2006 Langster looks badass in black.