I bought one like those recently and had to send it back, so this highlights something to check.
It looked like a bargain; Freeview and DVD 19" widescreen with PC (VGA) input so could also be used as a monitor.
The reality was that the screen wasn't actually a true 16:9 ratio (16:10 I think) and it just didn't display widescreen freeview correctly - everything was a bit narrow/tall. It could have done, with a narrow black stripe top & bottom but obviously they economised on the firmware. Oddly it did display widescreen analogue in the correct ratio - 16:9 was an option, it was only digital inputs that it wouldn't - so DVD's were equally distorted. The help line was 100% useless, so I sent it back and got a full refund.
All that said, the models you've listed look good and appear to have correct 16:9 screen shapes.