Originally Posted by Ola Englund
I am not arguing that you can't get more options with two (or more) mics, better is, of course, subjective.
However, given that the OP isn't familiar with the basic microphone models that are out there, it's safe to say that he's pretty new to recording. Someone new to recording should (IMO) concentrate on getting a great sound out of one mic before moving on to two or more. A second mic won't make an average guitar sound great. The issues that come along with making sure the phase on both mics is correct is an additional hassle that's (again IMO) not worth taking on when first learning to record.
I guess what I'm getting at is that it seems that so many posts on the internet about recording (and this is not necessarily aimed at the OP) are "I need this piece of gear because such-and-such producer guy used it on the Bleed Flesh Wound album that I love, and with out that gear I'll never get that sound". I am calling bullshit on that. First, because even with that gear you'll never get that sound, and second, learning how to use what you have will get you much better results than just adding new gear.
FWIW, I always mic my cabs with a 57 into a Neve pre and a 122 into an API pre, and then blend to taste, but the 57 is usually the bigger part of the sound.
For the OP, if you insist on getting another mic, look for a used Sennheiser 421, it's much more scooped than the 57, but will fill out the top and bottom much better than the 57. The two mics combined correctly can produce a very nice sound.