I was hoping that I could get some pros, cons, and comparisons to these two great Android 2.1 phones. I currently have the HTC Dream, so I'm pretty far behind!
I can't remember any regional US carrier that may carry the Acer Liquid, if there happens to be one. If you opt for the Liquid with 850 if you can find one (there is one), your choice is a regional carrier or AT&T.
Personally I would go for Sprint and the EVO 4G. You know its immediately with a large carrier.