So if.....

[mikgag]

...a SM57 and SM58 are basically the same mic despite the windscreen...

...and some less expensive SM58 alternatives that get great reviews when a/b'd against the 58 ie; Samson R11,CAD 22a,Nady SP5...

...then wouldn't one of these less expensive mics do a pretty decent job micing a guitar cab?

yes?

 

[gummblefish]

If you know how to use it, a mic that came free with your playstation could do a good job. So yes a cheaper mic can do a good job. In saying that i would rather use a 57 than a playstation mic.

 

[Big Kenny]

yes, pretty decent, placement and the amp make a big difference. Using combo of condenser/ribbon and a dynamic i another way to get a real nice sample

 

[chessrock]

If the amp sounds really good to begin with, it's actually kinda' hard not to get at least decent-sounding tracks. Depends completely on how picky you are and how important the project is to you.