If you're planning on getting an MBA there is no value in adding a business specific bachelor degree; especially since most people would consider a bachelor in accounting a type of business degree to start with. If you already know what MBA program you're interested in be sure to add any prerequisites to your transcript (even if you can't use them in your BA in Accounting, and most you should be able to get though alternative methods). Summary - skip the second degree, focus on the MBA.
Amberton - MSHRB
TESU - ASNSM/BSBA
TESU - ASNSM/BSBA