As always, excellent advice from The Elf.
Just a point about your plan to copy
the guitar track and then pan the two tracks L/R. Unless you offset the track slightly
(and perhaps add some processing to taste on one track), the net effect of that (as I've
discovered) is to put the guitar back into the centre of the mix in mono!
Should you wish to proceed down that route, the most effective way will be to record the
guitar part twice - to separate tracks of course - and then pan to taste. Of course it'll
sound like two guitars playing in unison, but it will give you some 'spread' - which your
... But listen to The Elf... the man speaks wise words!