Well you could go Intel and upgrade the socket everytime you need an upgrade, Next year when AMD release 'bulldoser' however they will no doubt release new sockets and new features for it. Out of benchmarks the AMDs perform close to the i7s, the benchmarks are normally highly Intel optimised so basically handicapping AMD from the start.
In the real world I'd say if you have the money go for an Intel chip that is if your gaming. If you know your going to use the 6 cores then I'd get the 1090T, seems like a pretty cool chip aswell.
Personally I was thinking how good Intel and was thinking about getting one until I heard about what kind of company they really are. Having secret compilers to get one over AMD and there was some stuff about handicapping the graphics cards because Intel wanted there own GPUs to perform better.
You hear countless stories about how AMDs have improved by 66% compared with only 25% for Intel when using the same archietechture, how Phenom IIs come within 10% of the i7 and how Intel chips are oh so much faster. At the end of the day though people will always defend there purchases, 2-3 more FPS with a chip that costs £50 more just to get more FPS than another chip, take that money and buy a better graphics card
If I had the choice out of the 6 AMD or an i7 920 or 930 I'd pick to 1090T simply because I perfer AMD as a company and just thinking of the possibiltys you could do!
Don't forget Intel boards cost a lot more than the AMD boards. Theres a nice Asus Republic of Gamers board for the 6 cores.