I myself, enjoy both the anime and manga version of all three of these wonderful things. I know portions of you people do not know much about One Piece/hate it, but a couple of you hate it because of the 4kids DUB. I will tell you, it is easily the worst dub EVER in the history of a japanese to english dubs ever. some entire arcs were even deleted.
now without your bias ( i know you all still have bias against one piece but anyway...).
I was wonderin which of the arcs you guys think is best right now. I will do my own comparison along this.
Here are some pictures of some of the better scenes in recent chapters:
Jirayia in ni dai sennin(hermit) mode using apparently a super rasengan bigger than the Oodama one Naruto in k0 against shouten itachi (kyuubi 0, this is what me and many other "narutards" call it since its between base naruto and k1 naruto( 1 tailed)).

Luffy pumped up after a huge powerup about 3-5 chapters ago (for those wondering, this is the latest chapter translated today, the powerup from 3-5 chapters ago was when luffy finally woke up after getting his own shadow taken from him by moria)

Finally some real fighting in Bleach will begin. I myself checked the newest chapter out a few minutes ago, and a good page I believe:
Here byakuya is using is byakurai on what seems to be a succesful attempt to defeat the enemy, who has a sort of after-image jutsu ( no not from naruto, but jutsu is technique in japanese so I'm sticking to it) that readers/watcher of dragonball ( not now but from a while back) would recognize chibi goku did against "jackie chun". except this guy is limited to 5.Now for my comparison on how the end of these arcs will be good. Bleach, the fighting so far looks quite good, probably a few suprises. however, as for a BIG important chunk of plot? not really. the fight against an unreleased grimjow was far better in my opinion.
One Piece now. I see that Luffy WILL lose his big powerup because the pirates that gave him the shadows to power him up stated it would onyl last 10 minutes. As for an actual permanent powerup, he will probably get a bit physically stronger, and maybe develop a new gear ( gear 4). The fight with Oz, the super huge ZOmbie controlled by Shikibukai member Moria, is going to be good apparently.
Last, but definitely not least, is Naruto. this Arc seems almost like it could be its only seperate part ( part 1 as pre timeskip and part 2 started after the Kakashi gaiden ended). as for how it can end, thats really hard. Madara is doubtfully him, but still, many people tihnk he is obito. I will luagh when kishi reveals him to be Madara. o wait, HE ALREADY DID. some people never learn. anyway, naruto was given the key to his seal, and it was stated many things about the kyuubi and such. AS for how this arc ends, its going to be ENORMOUS. Jiraiya will die ( WILL, Kishimoto WILL make him die for purposes of Plot and inferiority to Pein). Naruto might be able to finally control not only the 3rd tailed stated but even the 4th, new jutsu development ( maybe he can maintain and even throw the fuuton: rasenSHURIKEN ( its like it was meant to be thrown).
currently, I vote for One Piece ( since it will have a great fight with Oz). overall, I vote for Naruto for the ending of the current arc. that was my super long review, probably with plot holes all over the place. comments with your opinions/reviews are accepted and definitely recommended.
for anyone wondering, these were taken from the chapters at : http://www.onemanga.com/