A. My GTX570 runs cooler in my antec 902.
It is better and you sir just got owned (the above link, make sure you check whether it's meant to be higher or lower. The i7 2600k beats the 980x in a number of things and costs a fraction of the price)
Back on topic, I'd expect it to last a few years at least. You could always throw some more memory in it and bump it to 16gb in 4gb strips.