Looks like I'm headed to Atlanta; working downtown, living? I currently have Verizon and 1 yr. plus on contract. Looks like coverage is okay and EVDO available most areas. Should I consider another carrier -i.e., are there any flaws w/ VZW vs. others (unique to Atlanta...not looking for a broad carrier debate!) Also, is cellular available while using Marta or other special locations; does one carrier or another have better coverage? Thanks.