Well the ribbon will work fine and of course the industry standard - SM57

- can be used for really any guitar work.
You have a point about sounding crappy anyways - I had a guy that just has to play with compression and delay and chorus - I told him strip it down to bare bones we can add later - but NOPE that would not happen.
So now I am having to EQ like mad just to get a some what good sound.
ok so only 2 tracks for each one huh? - well you can work with that - now I see you are using logic rigt - you have plugins correct -I am sure apple covers those - I use Pro Tools LE - and I have a Mac laptop and do rough recordings on Garage Band and it sound really good too.
So if you can later add compression and EQ you can get the guitarssounding pretty good I bet.