Most apps, including games, do not use more than 3 cores currently. In the case of the 1090T vs the AMD quad cores, tests show that the quad cores are actually slightly better for gaming.
The only advantages shown by the hexacores are in highly threaded apps such as photo/video editing. This is why I was asking about how you will use the machine.
I don't see any quad cores "biting the dust" anytime soon. I am running a two year old AM2+ X4 940 overclocked to 3.6 Ghz and I can run any software I want. The point is, if you really want the 1090T I say go for it. Just be sure what exactly you're bragging about. You can get similar performance for less though.