XD. A classic disc without a current following. Both champ and dx ones are great, even though they are totally different discs.
As a second entry I say Mako. I just recently got one and it is my most thrown disc now.
Yeah XD love here too. I have 3 in my bag at all times. Sweet fast putter for everything from driving to putting. It might as well be a mid as far as speed goes. In Champ it holds any line and I can bomb a hyzer flip with the dx ones.