the motion battery is bigger than the quattro battery.
motion = 1700mah
quattro = 1600mah
a slower phone means more lag and more burn on the battery as the phone will have to work harder to accomplish the same tasks that better phones do. on top of simply not being able to do things a better phone can do at all.
not trying to sway you either way, just giving you the facts.
looks like you need to figure out what you're willing to compromise as each phone has things you dont like.
another option would be to wait for the ZTE anthem. it might come out within 3 weeks.
when it comes to choosing the best service one must remember: location location location!!!