If you want DVD recording, too, I'd suggest the Samsung DVD-HR753 is a good budget buy, at about £200. Or the Panasonic DMR-EX77 is even better at £100 more.
If you just want hard disk recordings, I've seen good results from the 250GB TVonics
DVR-FP250, at about £180, or the 160GB DVR-FP160, which is £30 less.
The company also has the DVR-FP2500/1600, which are slightly more expensive but allow you to record two channels at once.