If your looking for easy and metal "Runnin' with the Devil" comes to mind. It's not Pastorius, or Wooten, but it's easy to play.

ill look them up thanks...keep suggestions coming this is really helping.

you should try "for whom the bell tolls". cliff burton is wicked.

iron maiden is good finger speed practice

scorpions no one like you....rock you like a hurricane....most metal tunes in general are pretty easy to go through. any of the foo fighter songs...

yea, i tried "for whom the bells told" its ok...i'm still in the learning process

AC/DC. Pretty simple stuff that sounds great. And it doesn't really matter what your into, you can learn from just about any type of music.

If you want a kick ass bass line that will take time to master but impress people when you do try MuSE - Hysteria.

One of my fave bass riff's ever.

If you want to get seriously challenged on the bass, I suggest anything by protest the hero, their Bass player, arif, has amazing tone, and he is an extremely good bass player. Some of his riffs are intensely hard, but if you want to build up chops and you are a metal fan, this is a must, as the odd time signatures will for sure have you working hard.
As much as it may be difficult not to use one, I strongly suggest not using a pick. I find that when you use a pick, you are giving up on the element of bass playing that makes it unique and more challenging, and less like a guitar. I find you can also control your tone, volume and rhythm a lot better if you are a strong finger player. But that is just my opinion.