which would you guys go for assuming price close to the same. Do you think a used RS6 -- even CPO -- is a good idea or just a nightmare in waiting given its temptation to be flogged by previous owner?

I wouldn't get any performance car, second handed.

you just have to be careful of what you buy.

Growing up, a car with an FM radio was luxury. Especially when my Mom used to tell me and my brothers to ask the CTA bus driver what station to listen to when we brawled over The Loop vs. WLS and the Mighty Met.