This is the stuff I've bought from Marmitek (viawww.intellihome.be
you are in the UK):
1x IH3080/IR7243: Mini-Controller (picks up IR
from iPronto and changes it to Marmitek X-10 signals).
1x IH3010: Computer Interface
6x IH4020A/LW11 Walldimmers
12x IH1210/LM12: Plug-In Lampmodule + dim
All in use without an extender.
Thanks for your input Kees...I will assume that I will have no problem using these same devices living in the USA.