well i heard somewhere you have a 43% higher risk of bricking if you have to ask what your risks are
devhook is a firware emulator i sugest you use custom firmwares though
OE OE-A OE-A2 are bugfixes and revisions A2 being the latest
I suggest you use 3.03 OE-C its is much better IMO
any motherboard should work equally fine.