Hi Home enthusiast here. I've been using ProTools LE 8 and a DiGi 003 Rack for about a year now and am wondering if I should change my set-up. I use Shure 57s to record guitar and bass and a 58 for vocals. My levels are fine, but my recordings just never seem to sound that good. I play around with EQ and compressor effects but they don't seem to help much. I'm just now learning about Pre-Amps and have read some engineers say the 003 doesn't have good preamps. I do like using the ProTools software, but I'm not married to it. Is it possible the mediocre sound is my error, OR would you look to go with another interface (I've just read threads with recommendtions of MOTU and PreSonus models). My budget is $500-$800. 4 inputs are sufficient. Thanks a lot for your feedback!