i have a very modest home/bedroom studio. DAW=Reaper Interface=Scarlett 2i2 Monitors= JBL305P and i have 2 mics MXL 770 cardiod condenser large diaphram Heil PR20 cardiod dynamic Primarily, i use the mics for vocals & acoustic guitar. I do some light electric guitar work and mic the amp for that as well. i'm thinking of adding another mic... i'm not sure exactly what i want though. here's my thinking i have a longer term goal of eventually getting a pair of figure 8 mics so i can track guitar and vocals using the "blumlein" pair technique... but i can't really justify spending the scratch for that setup right now. i have an extra hundred bucks to burn on some kind of mic "right now"... or i could just kitty the money until i have enough to buy a pair for my blumlein goal. i've sort of always regretted not buying an SM57 so that's where my brain is telling me to throw the $$ at the moment. what do you think? is an SM57 going to be too close to what i already have in the PR20 so kind of a wash... or does every home studio need an SM57 so i should just go ahead and get one?? or is there something else i haven't thought of that would better compliment my feeble collection of mics?