Hi,
If the mk1 is update with hd-kit or if you buy mk2 the picture quality is very good
on HD channels, Mk3 and 4 has "Full HD" but its no tv channels that use it (and
not to be in years) because to see the different between HD and Full HD you have
to be less then 1 meter from the screen and all the other Standard channels are
so "poore" quality that you probaly sitting 2-4 meters away right?
Conclusition if you find a MK1/2 to right price buy it !
Regards
Tomas