Hi Guys
I've been following this thread and thought I'd throw in my experience.
I have a set of Ultimate Ears UE7-Pros and a Sennheiser G3, I run my basses from a Stageclix in to an Avalon U5 straight in to a X32 and run a through in to an Aguliar DB751 and DB212. I use an iPad to control my own mix. I sing BV's and use a Sennheiser e865.
The sound is wonderful and for anyone who's interested it's definitely worth it, everything is clear, rich and precise and unless you are using optigates on the mic's there's a nice level of ambience.