I agree I seriously recommend reading the Manga - I did it myself a couple of months ago and
It was an increadibly enjoyable read, got through like 50 chapters a day easy - I just Downloaded them and read them on the PC or PSP when I was away.
- The only bad part is when you get to the end and you have to wait each week for your One Piece fix.
Must admit Im a bit daunted about watching all the Anime eps though but I must get around to it. - Atleast I know its gonna be great storywise.