I plan to go buy one of these today with an sm57. It dawned on me the other day that the equipment my friend borrowed to me should probably be replaced. I was recording and the interface fell on the concrete floor when I accidentally got my foot caught on the chord. Then it dawned on me that if I break my friends stuff (since I'm using loaned equipment) I would have to buy one for him and one for myself eventually. I guess it might behoove me to pre empt that. I'm not really worried about the SM58 he borrowed me since they're so robust but the MXL990 condenser I don't really want to replace that either... So I think I'm going to try a 57. My drummer got one and it felt like it unlocked some headroom or clarity on his sound. I want to buy locally and I know I can get either of those brands of interfaces locally. I'm leaning towards just ponying up the extra 50 bucks for the scarlet 2i2 over the presonus 2 channel.