I agree with Daveyf if you must stay with Mac. That said, I think you are doing yourself a great disservice by painting yourself into a box with just one manufacturer for an amp. FWIW, a friend of mine had a 402 (as have I) and he replaced it with the 60th commemorative 75's and they easily excelled the 402.
I'd also like to note that my experience with Mac is that it is a bit soft in the bass.
I'd also like to note that my experience with Mac is that it is a bit soft in the bass.