Getting an Audi A5 soon. Just a few questions

I currently own a 2007 Hyundai Coupe 2.0 which has served me well. Whilst is has not let me down (and it still brings a smile to my face!), I just need to get a new car as it is getting old (done bout 120k now). Was considering a 3 series coupe vs Audi A5 but have made an executive and firm decision that the latter will be my next car. I won't be getting a brand new though (can't afford it) - a decent used one (circa 2009) will do.

Just a couple of questions. Which is better? The 1.8 or 2.0 TFSI. Also, what are the common faults with the A5? (with my Hyundai, it's the bearing).

Thanks