My typical recording setup goes something like this: 4x12->SM57 & CAD M179 -> Mackie 1220i Mixer -> Mac -> Reaper The sounds are pretty good, but I've heard that using a tube mic preamp can really get more levels of harmonics and such to come out. Has anyone tried putting a cheap tube preamp between the mic and interface as not just a boost, but for tonal benefits? I'd like the benefits, but I'm kinda suspecting that a more serious (expensive) preamp would be necessary to get those benefits and avoid introducing more noise. I'm considering things from companies like ART and Presonus. Thanks for the input!