Personally, I would not consider using wireless for a permanent theater install, but the OP asked for wireless suggestions.
No offense intended to the RC4 stuff, but it simply does not have the appearance of a professional product. It looks like a kit I would have bought at Radio Shack 20 years ago. Also having a
wall wart power supply is a non-starter for me. Maybe there are some models with a better
build quality, but I could not find them on their website; I actually could not identify what boxes I needed to simply
send and receive one
universe of
DMX. I know they exist because I used to have a pair.
I think the price
point of the RC4 products is good, and I could see them being very useful in set pieces and practicals, but being small and light, also makes them easily grow legs. For a robust
system from a booth to electrics, I would be looking at Wireless Solutions. They offer units that have a mount for pipes, built-in
power supplies, and powercon connections. Thier rack mount units would be a good fit for on
stage or in booth transmitters. Also, W-DMX seems to have become the most widely adopted for fixtures with built-in receivers.
In general the Idea that "Wireless is a mature tech, and is now just as good as cables" is hogwash. The spectrum has been getting increasingly crowded, and with the FCC selling off huge chunks of spectrum that were traditionally used by our industry, it is getting more difficult to use any wireless technology reliably. I have seen people posting about only having a few glitches a day, and to me, any glitches are too many, especially where it is
practical to go hard wired.