The B7 RS4 was a 4.2. V8 non turbo, which put a lot of people of it, as most Audi enthusiast thinks that all fast Audi's should be supercharged, which is why the new B8 S4 is a 3.0 V6 supercharged instead of the V8, so the B8 should be a better "investment" than the B7. Is the TT-S / TT-RS available in the US? All of the famous old fast Audis (B5 S4 / RS4, etc.) are turbo cars, not supercharged. The 3.0T engine was a big change since it was moving to superchargers instead of turbos, but most of those enthusiasts you mention are happy with any kind of forced induction.