I would also recommend ChillBlast.
Mine is getting on a bit now, but when I replace it I will use them again.
No hard sales from them, and their Help people know what they are doing.
I would also recommend finding a local one man/woman band who can "fix" stuff. I have never had a problem with the Chillblast machine, but having someone who knows how to fix stuff is better than speaking to a sales person at Dixons!