Tbh, Jag became better after the Tata takeover, before that there really was no quality in what they put out.If it was cheaper it would undoubtedly be an option.
However at the price it's not even about speed. It's about whether you're prepared to drop almost R1m on something completely untried and untested in the real world, over tried and tested competing products that have had decades of R&D behind them.
I'd take the latter, even at the expense of speed, for the piece of mind in knowing that I have a better product for my money...
In terms of quality this http://www.jdpower.com/cars/study/Initial-Quality-Study-(IQS)-by-Make/2430ENG puts the Kia above, so like I said the real issue is price. The other Germans are riding on badge prestige. A friend drives a 2016 c220d (+- 58k kms)and the leather on the armrest is pealing while my wife's 2013 Rio has an interior that still looks new, no cracks or anything pealing in the car. Kia just needs to revise the price. I would still pick the Kia over any of it's rivals.