I must choose a model of TFT TS USB Display..but what ?

I see on thi site these model

CTF700 - VGA 7" TFT - Touchscreen USB - PAL/NTSC - IR Remote - Audio *new*

or....
MM500 VGA 8.4" TFT - Touchscreen USB - PAL/NTSC - IR Remote

WHAT'S BETTER ?

Another model to redirect me ?


for carpc 16:9 or 4:3 ???

Consider i will use it for mp3 ...radio and gps navigation more than any other video application...maybe use for tv...

Then i hope all of your experienc could help me



Thanks