It's hard to pick between Twisted and X2. I've only been to SFMM once, but when I was there I got 5 rides on Twisted Colossus and 3 on X2. Twisted (imo) just ran perfect every ride I got on it. Of my 3 on X2, I had 2 very good ones, and one ride where I just wanted it to end because it kept crushing my legs. I gotta go with Twisted here.