I think you will be better buying from the US market simply because the $$$ is so weak, maybe entry level JBL, infinity, paradim etc, I would have thought UK products to be very expensive, have a look at your own market first if I was you.
Wanted to add, do put to comparison the Boston Acoustics. They are on offer currently by Circuit City and I'd consider them over equally priced Polk Audio, Klipsch, JBL.