Go with the Phoenix. Slack geometry makes for a very comfortable ride. Clearance for big tires helps to soak up the bumps. Longer chainstays let you hang a rack and panniers without having to worry about kicking them. Finally, there are two water bottle braze-ons and provisions for cable routing if you decide to add gears later.

I built one up recently, and it's a very good frameset for the money. The welds look great, and so does the paint. Pick up a build kit from bikeisland, and you can put together a slick ride for ~500 bucks.



[EDIT]: BTW I commute ~20mi. round trip on this bike. Coming from a track frame, I would not go back.