Panasonic do several models of recorder that also incorporate a HDD. Check out [Link: avland.co.uk] for further information.

There are now also several Freeview units that incorporate twin tuners and a HDD; eg: Pace Twin, Fusion and latterly Panasonic. Check out http://www.pvruk.co.uk/ for further information.

Between this lot I'm sure you should be able to conjure a combination that will do what you want.