Wich one if any at all?

Hi guys,

Can anyone post some opinions on the following Wadia models please?
Wadia 6
Wadia 16
Wadia 21

I want to buy me one as a second CD player, and a Wadia is my choice.
I'm not interested in the smaller sized ones, only the big ones with the 4 tower feet.
If there are any other models I'm missing, I'd appreciate if you include these (w/the exception of the newer and more expensive ones).
Thanks!
Brgsd, Marcelo