McCoy is very underrated and suffers sometimes from people confusing an actor with a show's tone and direction (I don't like McCoy because I don't like the McCoy episodes so much...even though he didn't write his lines, imagine the stories, or do other showrunner things. See: Martha Jones).
I would love to see more of this: New Doctor Who actors reading old speeches, and Old Doctor Who actors reading new speeches.
I'd love to see David Tennant or Matt Smith read McCoy's speech from remembrance of the Daleks. I tried to find youtube clips, but apparently we have successfully erased all two minute clips of anything copyrighted from youtube, and all that is left are children reenacting their favorite scenes, and people using action figures to write new ones. Sigh.
I refer to the clip where the Doctor discusses choices and life over tea with the coffeeshop owner. Matt Smith or David Tennant reading that would be awesome.
Also, McCoy's speech to the last Dalek at the very end with be cool by Eccleston or Tennant.
ALong these lines, I always thought Peter Davison and Adric would have done a more or less great job with the script "Silence in the Library". The fragility of Davison's Doctor would have gone great with that two-parter, and Adric's eventual death would work well with River's foreknowledge. "Why? What happens to me?"
Anyway, McCoy rocks.