Thanks Pollensa,
I should have added that I was only considering the recording models.
Because I’ve seen so many different 1100’s advertised, I hadn’t twigged that they were all the same machine and software, just different colours and HDD capacities.
As to the Freeview models, I’ve bought an HDR-1800T which may be faulty (see other thread), but if I take it back and exchange it, I may be able to upgrade to a better model such as the HDR-2000T, DTR-T2000 or the FVP-4000T.