I use the Line 6 rack mount XDR95. This is about as close to using a cord as I've come. It captures every nuance especially if you use your volume knob a lot. I cannot tell them apart... hell, it's so good I'm tempted to record with it. The transmitter and receiver work in tandem with telemetry constantly updating battery and signal level at a glance. It is a battery hog, but the sound quality is well worth the trade off. I've used the Samson and Shure rack units in the past but had to deal with RF and the usual cracks and pops associated with these VHF and UHF units respectively. I strongly suggest trying one if possible in advance of your final decision.