Thermador oven, cooktop

Hi everyone,

I am looking for the following items and some information on them:

WO-16A wall oven
SU-4B or SU-4AN cooktop (45" x 17.5")

Alternatively, any of the 45" x 21.75" cooktops would work:

SU-6AN
SU-6B
SU-4G
SU-4GAN

Regarding the wall ovens, do they really work properly? Where can I get
parts/servicing? Can I get an install diagram for 2! 40v hookup?

How are the electric cooktops? Thermador recently discontinued all
their coil electric cooktops which were very similar to the old ones.
What do you recommend? New or old? Replace the coils? Are parts
available?

Thanks very much for your thoughts and suggestions!

Carolyn