I know, I really, really, really want to buy a EW100 ENG kit, but just can't justify it.
A good company for sound stuff is LTF near Uxbridge, Middlesex.

www.ltf-uk.com

And they sometimes have excellent second-hand stock. I keep meaning to get an SQN from them, but that's also a "want-to-have" rather than a "need-to-have".

I've got a couple of excellent microphones and all the gubbins for one end of the sound chain, at the other end I can blag cameras, but I've got these voices in my head... It's a sound mixer, wireless kit and a hard-drive recorder shouting at me to buy them...