Oh i agree that everyone loses eventually; noone is invincible, and i agree that Sanchez is a great fighter, or at least he will be one day. I just wouldn't put him anywhere near my top 5 yet. Diego and Karo was my favourite fight of 2006.
I haven't had the chance to see Faber fight, but i understand he's considered a very good featherweight. Wonder if UFC will introduce that class eventually? Lots of guys at 155 that could easily go lower. Manny from TUF 5 is a good example. That dude would kill at 145.