Realistic Bass samples?

I am somewhat a newbie to GarageBand.

I've been playing around with the new "Drummer" that just came-out in GarageBand 10

and I love how realistic it sounds!

However, if I try to play bass using my maudio keyboard,

the stock bass sounds in GarageBand don't sound very realistic to me.

I don't need anything exotic, just a simple but realistic sounding

Rock/Pop Bass Guitar sound.

Any ideas for perhaps third party samples or plug-ins?

I'm using a current macmini with mavricks, i5, 8Gb Ram and ssd.

Thanx!