Oh man, theres a lot on that list...lemme see...

Barerra vs. Marquez (so much quick, sharp, accurate punching/countering in that one)
James Toney vs. Vasilly Jirove (Heart from both fighters, dynamic finish)
Floyd Mayweather vs. Zab Judah (I love seeing two quick, skillful fighters go at it)
Diego Corrales (RIP) vs. Jose Luis Castillo 1 (Amazing in-fighting exhibition, fight had me pulling my hair in the last round)
Thomas Adamek vs. Paul Briggs 2 (didn't see the other 2, but this one had crazy ebb and flow)
Evander Holyfield Riddick Bowe 1 (Haven't seen the other 2, but this one had crazy-ER ebb and flow)
Micky Ward vs. Arturo Gatti 1 (Haven't seen the other 2, but this one had the crazy-EST ebb and flow)
Sugar Ray Leonard vs. Wilfredo Benitez (rough boxing match with good heart displayed from both fighters)
Sugar Ray Leonard vs. Roberto Duran 1 and 2 (both were competitive, even the so-called "no-mas" fight)
Sugar Ray Leonard vs. Thomas Hearns 1 (amazing role reversal in this one)
Marvin Hagler vs. Tommy Hearns (nonstop action)
Roberto Duran vs. Iran Barkley (I believe this was '89 FOTY...nuff said)
Muhammed Ali vs. Joe Frazier 1 (rough fight, Joe displays what to do against an outside boxer)
Muhammed Ali vs. Joe Frazier 3 (rougher fight, Ali in much better shape, showing great reserves...Joe with massive body punches)

And for the one-sided or ridiculous beatings I can watch over and over again...

James Tony vs. Iran Barkley (Tony was just sick at super middleweight...he beat the hell out of Barkley like I've never seen)
Floyd Mayweather vs. Arturo Gatti (Why I say that when Floyd wants to turn it on, he can hurt you...bad)
Marco Antonio Barrera vs. Naseem Hamed (Good to see conventional boxing beat an unorthodox style)
Roberto Duran vs. Davey Moore (absolutely mean and brutal display by ol' Hands O' Stone)
Kostya Tzyu vs. Zab Judah (the dance after the right hand makes this one)
Oscar Delahoya vs. Ricardo Mayorga (left hook was beautiful, plus good seeing Mayorga's mouth silenced)
Felix Trinidad vs. Ricardo Mayorga (more mouth-silencing-goodness)


I'm sure there are many others, but these are the one's have had in my collection at one point in time.