The cornerstone electronic consumers label. All the rest are possibly imitations. You couldn't possibly argue when you have a roster that includes Aphex Twin, Plaid, Two Lone Swordsmen, Prefuse 73, Squarepusher, Boards of Cananda, Chris Clark, LFO and Nightmares on Wax. It really does speak for itself.
And if that's not enough, there's Warp Films (all things visual), Bleep (digital downloads), Warpmart (where you can shop online) and possibly the coolest record label website in the world.