You can angle one sm57 with 22,5° to the speaker and you have the fredman-style but without the options of changing the levels between the two mics....
I used to use 2-3 mic setups for tracking guitars, but over time I've scaled it back to a single 57 or Beyer MC930 and I think my tones have improved because of it. I use the time I used to spend dealing with phase to get the mic placement and guitar tone right without relying on any EQ or compression, it makes things much easier when it comes time to mix.
If the player/guitar/amp sound good, it's hard to go wrong.