I have a Sagem PVR6240T which has 2 tuners + HDD so you can watch one channel while you record another its very easy to use I have it hooked up to a DVD Recorder so if anything I record is worth keeping I just copy to DVD
This site is a good source of information for Freeview
http://www.radioandtelly.co.uk/cgi-bin/forum/YaBB.pl
Boxes
http://www.radioandtelly.co.uk/freeviewreceivers.html