I've been a blackberry/verizon person for years. I'm having to quit verizon due to poor coverage(its bad enough they are eating the early disconnect charge) and am switching to AT&T. My wife just got an Atrix2 and loves it. I like a physical keyboard but its not a deal buster.
I have to have a phone that has good reception for my job (physician) but beyond that I mostly do calendar/email stuff. I don't text a lot and w/ a blackberry aps haven't been a big deal but am sure that will change.
I am interested in recommendations on phone selection and tablet selection. Also, is there an advantage/disadvantage to a carrier tablet or just buying one from a store?
For keyboard, I'd go with Samsung Captivate Glide, it's really the best option on AT&T for a full featured Android devices.
Non keyboard your top phones are Samsung Galaxy SII/Skyrocket, HTC Vivid or your wife's choice, the Atrix 2.
I can't really comment on on-contract tablets however, as I bought a Galaxy Tab outright and don't use it on a data plan.
If money isn't an issue I'd recommend ordering a Samsung Galaxy Note from one of the online sources and kill two birds with one stone since its niche is Tablet/Phone. Google it, it's impressive even without LTE. There's ror it will be announced January at CES but if you're like most of us..who can wait that long?!