If you want a broad range of sounds the standard THR10.
if you prefer blues and rock tones then the THR10C.
If you are a metal head the THR10X is the one.
I have the 10C and think it's great. The Andertons guys reckon the wee Vox thingy has the edge on sounds, but it looks like a knock-off handbag while the Yamaha looks cool as. Suppose it depends if these things matter to you.