I've used
Nexity Bank for 4 years now and been happy with them - they rebate up to 4x$2 in ATM fees each month. They're an on-line only bank, so you'll be getting better interest rates on that $50k -- and it sounds like you don't have much use for branch locations anyway.
Downside: you can't make deposits at ATMs. You mail them into their home office -- but it's Business Reply, so you don't have to pay postage.