Your account, the phone number, and it's balance is tied to the SIM card, so whatever balance is on the old SIM card will be the same when you put it in the new phone. If you want data, just ask a Speakout CSR to activate it, and you will be deducted $10 more a month.
The 1661 has a pretty good antenna, so if you are not getting a good signal with that, you probably will not get a good signal with another phone. The Rogers tower is just too far. you might have to find a phone that can have an external antenna attached to it, and even then, that might or might not work.