For digital recording with an XLR mic, which of these is the quietest in
terms of background noise (and RF noise), as well as the most transparent in
terms of frequency response?

1) Yamaha MG 10./2
2) Behringer UB 1202FX (comes with 100 digital effects!)
3) Other under $100 behringer UB mixers without effects
4) Alesis Multimix MX6 (comes with 101 digital effects!)
5) Peavey PV6

Thanks,

J