Best deal, short term is the Sprint Tab. It's $399 with a 2GB plan for $30.00/mo
I'd rather buy the thing on contract to be honest because the $30.00/mo you won't even notice.
T-mobile has it for the same price but for $25/mo you only get 200mb.
This will work good for you, but where I live, I get little to no T-Mobile signal. I'll go with $599.00 and 1 month of service before I buy a T-mobile tab.
If you go the T-Mobile route your total cost after 2 years is $399 + ($30.00*24 months) = $399 + $720 = $1119.00
Just my $.02