To bad they don’t make the ES10 anymore. The ES20 is not half the machine. It is full of bugs. It locks up and is difficult to get it to reboot. I like Panasonic but I wouldn’t recommend this machine unless you like pain.
The only difference between the 2 is the DV input. Panasonic still shows the ES10 as available, BTW, and it’s still listed at many online stores… I doubt that your difficulties have much to do with it being a ES20 vs a ES10.
Depends where you are. In Europe we have the 20D which has an additional DVB-T tuner.
I did see the specs of the ES15 which is believed to replace the ES10. The only obvious difference was the addition of a DV input.