Keyboard For Soundtrack / Gargageband?, Best one for novice? Options

[edge]

I've been using Soundtrack for some time, will probably add GarageBand to the mix, and I want to expand the possibilities with an inexpensive ($200 or less) keyboard. Apple recommends two keyboards on the GarageBand page, so I'm currently looking in that direction, but I don't know if these or others are best for me.

They are:

1) M-Audio Keystation 49e USB Midi Keyboard ($79)
2) Edirol PCR-30 MIDI Keyboard Controller ($169)

About them:

- One has 49 keys while the other has 32 (does that matter to me?)
- One is titled a 'controller' while the other is not (whatever that means)
- One has more nobs and buttons than the other (but maybe these are not necessary and effects can be handled via software...?)

About me:

- I don't necessarily need/want to learn to play piano, just want to be able to create new melodies and loops.
- I played drums for six years so I have rhythm.
- I'm a music nut and know what sounds good.

Any recommendations? It's more a hobby, but partially for business.

Thanks ahead of time!

[edge]

First, please excuse my mispell - Gargageband - doh!

Second, thanks for the feedback so far. I've learned a bit more about MIDI controllers, velocity, octaves, etc.

My budget is under $200 and really I just want something to create some loops and maybe record a few leads. I don't anticipate playing any full songs and I'll most likely be messing around with simple chords and riffs anyhow. I'm leaning towards something small and portable at the moment. Has anyone used the following with Soundtrack, GarageBand or otherwise:

MAudio Oxygen 8 25-Key USB MIDI Keyboard Controller ($140)

I think it may meet my immediate needs and then, who knows, maybe I jump to a Grand