WOW! That's, like, 3 threads! LOL
Anyway, my personal belief is that a high gain guitar sound is naturally compressed, so I use no compression on distorted guitars.
Mic of choice at the moment is BLUE's The Ball mic, and I use a little ART tube mic pre, which is very good. Another great, inexpensive mic pre is the Pre Sonus ...
Mic pre of my dreams is a vintage Neve; mic of my dreams would be a 1930's Telefunken or, for a new one, a Neumann TLM 103.