I decided to reply here instead of starting a new topic, because I thought the suggestions made were interesting enough to continue with.
Of the limited number microphones that I own, and have used at some point for electric guitar, two of them are no longer made. Which of course makes it sort of pointless to suggest them to anyone.
I mention them only to gain some perspective and knowledge on the subject. One of the discontinued mic's happens to be an older German omnidirectional. Sticking it in front of a guitar cabinet yields results that differ greatly from the standard 57's, and other mics I have tried. Less proximity effect, and the ability to mix the drivers by mic placement. I was just wondering if anyone regularly or has used omni mic's in this capacity? The other is a Beyer M500. Beyer has recently introduced a model that looks like an update to the discontinued M500, a mic that has also been used with nice results on electric guitar. I was just wondering if anyone has experience with the new version?