What's the point ? Processors are getting faster and faster. UAE is just a little app now. Plus apps are no longer that useful and have mostly been replaced now. What's the point of spending many resources having a Xena solution whrn UAE already does its job perfectly?
I've tried E-UAE, WinUAE and UAE, but none of them do perfect emulation. Most importantly hardware emulation in a multitasking system requires buffers for everything, which naturally makes input/output lag. It's an awful experience if you are playing games.