Wireless keyboards can give some problems at a POST/BIOS level. That will depend entirely on the plug and play ID that they have and the initialization time. Your motherboard has a back to BIOS button that you can use if you wish to get in BIOS using this keyboard.
In regards to the 2 audio controllers, Windows* is not so efficient with several controllers doing the same thing, if you have a conflict, the best solution is to disable the one that you wont use. Now that you will be able to get in BIOS, you can disable it.
Using a RAID that came from a different controller is not a good idea, the fact that newer controllers can read the arrays from a previous one is made so that you can recover the information and back it up. You can keep on using them, but the performance wont be good.