Pride has some brutal matches compared to the stuff on UFC, so watching that first Pride match with Chuck against Quentin 'Rampage' Jackson I thought, mannn, this dude is gonna get lit up by Chuck. Quite the opposite, as Chuck's corner threw in the towel before he got hurt seriously by one of Rampage's patented belly suplex splashes. Chuck got manhandled like I have never seen in UFC, so thats what made Pride interesting to watch.
Even so, Jackson got whupped by Valdelay Silva several times, so consider him the top middleweight .... nobody in UFC would put up much of a fight there.
Best Heavyweight is Fedor, by far. The only competition I really see for Fedor is his freakin' brother !!! Pride matches are based in Japan so the pay is better, but it is funny to see these 'world' fighters show up in Pride to test themselves, only to get carted out soon after.