Personally,I really like both guys--they're my top 2 in MMA,with Silva being #1--but I think that Anderson is just too big for GSP to fight him @ MW.I honestly think that Anderson will beat GSP no matter what weight they fight at,because I think that Anderson's standup defense (something that is not given the incredible amount of weight that it should have by most MMA heads),Anderson's reach,accuracy,speed,mobility,striking arsenal,devastating firepower,underrated takedown defense,bjj arsenal and gnp defense,explosivity and strength are too much for GSP.In GSP's last 3 fights (Shields,Kos,Hardy) GSP has shown that he'll still beat anybody who can make WW but it seems as if "big" WW guys give him more problems (because let's face it: Shields,Kos and Hardy aren't WW they're MW or small LHW who cut to WW) than legit WW guys do.Anderson is bigger than any of those 3 except maybe Shields when Shields is fighting LHW.Anderson--like GSP--simply takes away his opponents' strengths and forces them to play into whatever game plan that Anderson has. But Anderson would find it And I'm afraid that if Anderson wins via comprehensive KO or TKO (which I predict would occur) that it would damage the marketability of GSP. I think that the future of MMA rests squarely on GSP and Jon Jones' shoulders,with guys like Edgar,Phil Davis,and of course the mighty Jose Aldo right behind them. I want these cadre of younger fighters to carry MMA forward and much further into the mainstream.The kind of damage that I fear that GSP could receive at Anderson's hands could delay and would certainly weaken the appeal and power of GSP's "brand". I'd watch the fight if it happened,but with a sense of concern for GSP. However,the GSP v Diaz fight is a wholly different thing. That fight could be spectacular. Diaz is clearly the best mix of striking and subs that GSP has ever faced.Nobody else is close. Diaz won't tire (this dude has multi marathon endurance) he has a long reach,and his striking style is a danger for GSP's still developing defense. Plus the trash talk that Diaz might unleash would be ill.Aaand a cross-promotional title fight between two extant organizations? Very good. Plus it gives Strikeforce some much needed shine for its excellent cards and fighters. But it probably won't happen because I don't see Dana wanting to give Strikeforce shine on a UFC card.