I own a ENGL XXL (plugged to an ENGL Savage) I am quite satisfied with the cab, but there is a little something not quite perfect when mic'ing it with the classic SM57. ENGL cabs are, to my ears at least, on the "edgy" side. So I don't feel the SM57 is the greatest match for those. I already have a e906 which does a decent job, but that's still not what I am looking for. I'd like more bite and slight less fizz. The e906 is alright, but slightly more boxy than what I am looking for. I heard nice things about the Heil Pr20, but I wonder if it is that different from the SM57. And also, this is roughly the price range I'm looking for (e906, Pr20, etc). Thanks for the suggestions.