Everyone has different ears, so what some like others detest. I only say this as in my journey through a few amps driving my 3.6s, I found the Audio Research 150.2 to just lack a little punch and for me, McIntosh MC501s are my nirvana.
I never tested the 402, and your ears tell you what you like, but there are many Maggie owners who love McIntosh and the same number who don't find them attractive.
Good luck, btw Mye stands are the best and cheapest tweak know to Maggie users (I have NO relationship with Grant Mye, I am just a big fan of his stands!).