The ESN switch is possible, and neither phone requires a data plan.
Stores should have the same pricing. I know we do (I work for a premium indirect) The biggest advantage to buying the phone in a store is if you have issues with it or decide you want to switch, you can do it directly in that store.
LG phones (especially the ENV line) are great devices. I have the enV2 and it is by far the best phone I've used. Battery life is amazing, I never have people complain about my voice sounding distorted, and I can always hear t...
do you have the bluetooth and other antennas off?
Blue tooth is off when not in use. What other antenna's are you speaking of?