Having owned a 135, I will argue that outside of the engine; that car has exactly 0 reedeming qualities.
1- it doesnt handle well due to the short chassis and no lsd
2- not much lighter than a 3
3- doesnt look good, proportions are off
4 - runflats and the suspension setup is awful
Mine was stock and later modded and neither were good outside the engine. The chassis is insanely easy to overpower.
The S3 is very solid... u may miss the Tq of the N54 but as a daily car in my honest opinion it is significantly better. It comes w magride, a much better stereo, is a little larger and handles real nicely for a fwd biased car.
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2 x N54 -> 1 x N55 -> 1 x S55-> 1 x B58
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