Yes indeed. Light mods could easily reach 400hp, very tempting indeed. But I doubt the handling is good enough to handle such power in its stock form

In the meantime, I managed to stumble upon the A6 FL 3.0 TFSI. Not sure how reliable and how whiny the supercharger in practice. 
Yes indeed, C43 E43 engine haha just without the snappy 9G-TRONIC

Woah, then I guess the A6 3.0 TFSi is a no brainer? S4 engine in an A6 body sounds like a total win. But yea, heaps of nightmare from the EA888, although Gen 3 did solve a lot of the issues.

The main purpose of me buying such a high power car is that, I foresee myself doing a lot of high speed highway driving. Like JB-KL that kind. My current Camry is doing the job perfectly fine but I needed something faster. A Bluetec will defo save me heaps of money in the long run but it just lacks the fun and potentially time sitting in a workshop. If I were to carve corners, I would be buying a F10 LCI or early G30 instead.

W212 E400
A6 3.0 TFSI FL
Passat B8 2.0 380 TSi
BMW F10 520d

Well said. People might say the Honda City and even the Alza could reach 200km/h, why buy conti?

In actual fact the bluetec is about 30% faster 0-100, and does 230km/h if you give it some persuasion. E400 however 

One thing that I did ponder about is the maintenance of a 4 pot over a 6 pot, lesser EO needed; lesser spark plugs etc. But the sound that a 6 cyl is just priceless.