Multi-Effects Pedal - What should I get?

I've been getting back into Tool lately, and as most listeners can hear, Justin Chancellor uses many effects with his bass.
This has inspired me to screw around with some effects built into my dad's guitar amp on his electric, and I've been coming up with what I think are some pretty cool psychedelic sounds.

I was just wondering if anyone knew what a good multi-effects pedal would be to start with for bass.
I don't want to spend $3000 on a bunch of single, analogue pedals just yet, but I want to have at least a few sounds to play around with.

Price range is up to $350 for now, and I would prefer a unit with a whammy pedal if at all possible.
I know Dman has a Korg Pandora and you get a lot of good sounds out of that thing! I looked for a similar unit with a pedal but couldn't come up with anything. Does anyone know if such a thing exists?
Just wondering if anyone had any experience or recommendations!

Thanks!

There are pedals that are sold for the korg as well.
I have the korg also and i dont really feel the need to be able to change the sound halfway through a song.

Excellent multi effects pedal had mine for about 5 years before i sold it. Was still in perfect working condition. It's a work horse, Solid rugged construction. Kicking myself now for selling it definitley going to be buying another one when i can. Highly recommend it. [url=http://www.bosscorp.co.jp/products/en/ME-50B/]