It depends on what sort of screen size you want as much as anything but I picked up one of these Prestigio tablets from Maplin in October and have been really happy with it.
Having the 3G functionality may or may not be useful to you but it’s handy to have the capability there anyway, just in case.
Personally I prefer the 10″ screen, makes it much more usable and video is much clearer that the 7/8 inch tablets I’ve experienced.
It comes with a case in the box as well.
I’d previously had a real cheapy from Ebuyer (about £80 IIRC) but this is far superior. My Dad preferred is to his 8″ Samsung after playing with it a few weeks ago.