I haven't used a cable in about 12 years. I still use an old X2 Wireless system in my main rig. These guys were out of Sacramento and had a great product pretty early on in the digital wireless development. They sold their tech to Line 6 and that is where the G systems came from. They are long out of production, and I got a spare xmitter on ebay about 10 years ago that I still use. It still works really well, although it's a 9V battery on the xmiter and it last about 3 hours - so not the best in that department. The sound is steller though as is it's range. It is a full width single rack, but has a great visual display of battery and signal you can see from anywhere on stage. (I think I spotted one in Mark Day's rack in a video of his band, so maybe he is using one of these too.)
I bought the Carvin WG5 last year and I really like it. It sound great and seems to have good range and the battery lasts pretty well. I have not gigged with it yet, but I am considering trying it in smallish clubs. No rack unit, no cables or power adapters, no weight to speak of - no nothing. As simple as a cable, but without the cable. These days lighter and smaller is really important to me. Both systems sound great, and I have no issues with noise or dropouts and can't really tell a difference from a cable.