So I found out that my 25 watt Fender amp gets AMAZING tone and I have no way of replicating it on my actual amp that I use to gig. So I figure screw it, I'm just gonna mic my Fender at gigs now, save the hassle of carrying a heavy amp and get stellar sound.

My question is, what would be a good mic for a bass amp, I have an SM57 lying around or do I need something else?