my tt was massively modded i bought a 3.0 si and was dissappointed the tt would have killed it , admittedly it had skn remap , kn3 full suspension upgrade , mkn exhaust , sn3 turbo chip , brembo gt upgrade brakes big kit , but to be honest its not all about how fast even though i broke the bank to get an M i bought the tt because it was pretty , after 5 yrs of modding , always thought the Z looked pretty bought one , missed the power bought an M now best of both worlds apart from in the snow or ice my tt with a upgrade on the haldex as tt,s are not full 4wd did feel better , its an audi con calling it a quattro only real quattro are a6 , a8 full torson system , buy a Z !