Purpose of the mixer: 1. To record my drumset at home 2. To mic a Christian band in live settings and/or church.

Load: 4-10 Drums mics, Micing two guitar amps, Bass guitar, acoustic guitar, 4 vocals, Piano/synth

these are the ones i have been looking at. tell me what you think please.

Allen & Heath ZED-24 Mixer
Yamaha MG206CUSB Mixer
Behringer XENYX XL2400 Live Mixer

And the ones mentioned below.

And whats the big difference besides the amount of channels on these:
Allen & Heath ZED-428 Mixer
Allen & Heath ZED-420 Mixer