I know there are a ton of threads about commuter bikes, but I have four in mind and want some others' opinions about the advantages/disadvantages of each one--if anyone has any of these bikes, please tell me how you like them.

About me and my commute:
I'm about 5' 9". I would commute 6 miles back and forth each work day, so 12 miles 5 days a week. The biggest incline would be a bridge across the East River (NYC).

The bikes I'm considering are:
1. The Novara Fusion: http://www.rei.com/product/744803
2. The Electra Amsterdam: http://www.electrabike.com/amsterdam/
3. The Kronan: usa site here: http://www.kronan.com/USA
pictures here: http://www.bouf.com/buy/product/1368
4. The Jorg & Olif Opa: http://www.jorgandolif.com/opa_scout.html

I haven't commuted by bike before, and I like how these look good, have nice features, etc. etc.
If you know a bike like these that would be nice, my requirements are
1. Rear bike rack
2. Front lights powered by dynamo
3. Under $800
4. Can ship to U.S.

Please tell me info on the above 4 bikes. Do you have one? How do you like it?

Thanks in advance everyone,
Zack