Fastest Thunderbolt Hard Drive

Looking for the best value in an external hard drive. I need 1TB or more. I have Thunderbolt and USB 3. My Firewire 800 drive is running at 60mb/s and the Rugged LaCie does 110mb/s and I think the Buffalo 1TB is around 110mb/s as well.

But what's the fastest? Pretending that money is no object, haha! And then what's the best value? I like the WD My Book, it's 6TB and does 200mb/s + but it's pretty pricey. I would love to find something that fast in the $200-$300 range.