Out of curiosity, what do your Battlelogs look like? Here's mine:
I usually end up playing hardcore TDM by myself of conquest with friends.
I still greatly enjoy playing on the OCN BF3 server, but I found a pair of hackers tonight. They are WatchThisChit and No_Habla_Englis, both with the [AIM] tag, if you want to do anything about them. They seem to be able to instantly kill anyone who is piloting a helicopter or jet of any kind with any gun, including shotguns across the map. Just wanted to throw that out there.
Like Widdyjudas said, the new case fixes the problem with the PCB, and I actually have never heard of any problems with the power button on the older case, which is the one I have.As for a motherboard, I'm assuming you're going for the red/black theme. I say have a look at the MSI Z87 Gaming series. I'm also going for the red and black, and I've been using an MSI Z77 board. It has been working really well, and it looks great, too. [[SPOILER]]