There's a super-duper new Xbox Elite Wireless Controller Series 2 pad coming this November 24th for Ł160/€180.
It's got new Bluetooth connectivity, a rechargeable battery which lasts up to 40 hours a charge, apparently, and fancy-pants adjustable tension thumbsticks. There's a wraparound rubber grip for your palms and the hair-trigger locks are even shorter, so the delay between pressing and shooting is even, well, shorter. It can even save three custom profile set-ups on the pad itself - you slide a switch to choose between them. What can't it do, eh - cook the dinner?!
The Series 2 Xbox Elite Wireless Controller will work with both Xbox and PC.