Order the 4.Ai + package and choose Buckey Burl (in the not section write all black/grey buckeye)
Megadeth sounds great with the 4.ai's. Dave's voice has a nice, clear defiance to it, and it feels as if the guitars have the right tone and balance to them. If I were you, I would try out the 4.ai's. I was a little hesitant at first, but man, these are really spectacular, and the customer service is out of this world.