Personally I wouldnt go for Lees suggestion as it only records to Hard Drive, much better to have a DVD recorder as well.
Something like an LG product
here for about £199 with an 160gb hard drive and dvd writer to keep permanent backups - you need the £25 freeview box as well but its well worth it especially as they play DIVx files which there are plenty of on the net.
You can get dvd recorders with freeview built in but they seem to be more expensive, better off with the extra box.