I cannot recommend on personal experience, but for that kind of money, I would probably look at a Jamis Aurora. Its really a touring bike, so if there is a reason why it is unsuitable as a commuter, more experienced, please comment.

Edited to add: the Aurora is high on my list of "I wish I had more money". May not really fit your requirements - so:

1. Will this be your one good bike?
2. Will you be doing only pavement rides?
3. Do you need to carry loads when commuting? i.e., will you be likely to use racks, panniers etc?
4. How many miles to you commute?
5. Do you want to actually race on this bike as well?

I'm not experienced enough to give advice, but I can ask the questions that you need to consider since I went through the same process recently