I'm on good terms with a local install shop, and they told me that RF is pretty much crap now. I used to have a RF Punch amp in my truck. It is the one that decided to turn off at random times (not thermal related.)

When I went to get a new one, they told me they didn't carry it anymore because the brand was going to hell... They recommended a Kicker Impulse 404 (slightly smaller than Hugo's), and it sounds great!

Can't help you with the US -> UK import though...

-Trevor