The problem, why in your particular case the board died on you was not the update as such or the BIOS version you updated to but a "flaw" in the M-Flash procedure. Your board would not have "died" on you if you had flashed the BIOS under DOS instead of M-Flash. This particular M-Flash problem was present only in the initial BIOS release your board came with (E7696AMS.100).
Because of that kind of M-Flash glitch, we (here in the forum) specifically keep advising users to stay away from M-Flash. Especially in earlier BIOS version this "feature" has a history of not functioning as it should (once, on a different board, M-Flash flashed part of a MS-Word file (that happened to be on the same USB Flash Drive as the BIOS File) to the BIOS Chip).
What do you think - stick with another A75MA-G55 or go Asus or Gigabyte?
As this is not the place to advertise or recommend non-MSI products (this is an MSI forum, obviously), I am not going to comment on ASUS or Gigabyte alternatives. I would stick to the MSI board, as the problem outlined in this topic was not really the board to begin with.
Your original problem (the B2 problem) has been already fixed some time ago, as the BIOS Changelog and user feedback prove. The death of your board was caused by a third-party (MSI) BIOS Flash routine. It would not have happened with the first-party flashing utility provided by AMI.