Not sure about a bank, but it's usually best to stick with the same bank that have your personal account as you already have a relationship there.
As for Credit Cards, I strongly recommend using Advantafor small business accounts. Especially if you have multiple people that will have credit cards on the same account. I've found Advanta's online reporting is much better then any of the other credit cards that I've used and really helps me track things among the different card holders. I've also found they will quickly increase credit lines once you establish a regular relationship with them.
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