Open several accounts and spread your transactions across the accounts. The advantages:
1) The volume of transactions per account becomes lower and less likely to trigger some bullshit "suspicious activity" threshold.
2) If one account gets shut down you can still continue operating your business with the other accounts while you take your time finding a replacement for the one that got closed.
This is good advise... from personal experience a non friendly btc bank gave several "notices" that the account would be closed... after awhile I simply withdrew funds and moved them to a credit Union (less likely to be anti coin)...
Once the banks realize that they don't control the market they will change their tune real quick... the first few btc friendly banks (or exchange houses) will reap huge benefits = game changers :^)
We're just getting started... don't let the old school corrupters influence what is a positive revolution.