MIDI Keyboard Suggestions?, MIDI Keyboard Suggestions? Options

I'm looking for a keyboard no more than $500-600 that I can hook up to my computer for just MIDI sequencing. Any suggestions?

[SLG]

You can buy a secondhand keyboard (that's what I did).
It's cheaper but becareful! You must be shure that the keyboard is still good working!
I bought an ORLA DMK 8 (it's an old one) for 125 $. I wanted a FATAR SL 880 but I didn't find any.
There are some disadvantages with this kind of keyboard because it's really big and heavy (if you want to go out with).
If you don't care about the keys touch quality (synthesizer's keys are light contrary of keyboards), you can buy a synthesizer with sounds inside (contrary of what we can think, some synthesizers have good sounds) .
I heard that keyboards FATAR SL 880 (or 1100) are good
You can get a new one for around 500$.

seb