I'm looking at these two systems for use in a weekend bar-band. G3 is $800, EM900 is $400. They both have stereo/mono, 2 inputs, and limiters (G3 adjustable, EM set). The frequency ranges are: G3 - 24 Hz-18KHz, EM - 30 Hz-15 KHz (-3 dB) S/N: G3 - 90 dBA, EM - 80 dBA Additionally, the G3 has an Ethernet port (for computer controlling, not a big issue for me), a second antenna (I'm assuming the EM doesn't), 5 band EQ (a plus), HDX compander noise reduction (another plus?), focus (in addition to mono/stereo, don't know what this is), and a rackmount kit (a $35 plus). The EM receiver (body pack) has a pan control (probably a plus), Phase Lock Loop (PLL, noise reduction?) and reportedly a better ear bud set. I'm not sure who the Carvin system OEM is, if in fact not Carvin. Never having used an IEM system, I'm looking for input whether the G3 has enough benefits to warrant the drastic price difference.