Korg X50 bit the dust; need a new MIDI controller, 61 keys, <$300... good options?

[zircon]

I've been using a Korg X50 as my MIDI controller since June 2007 (when I got it used). I went away on vacation, came back and now it doesn't turn on. Though I'm sure it can be fixed, I'm skeptical this will be a small expense, so I'm considering the possibility of getting a new controller. Things I liked about the X-50:

* Shallow depth and height, allows me to put it behind my typing keyboard.
* Light.
* Synth action (though semi-weighted would be OK too)
* A few knobs and two wheels. I don't need a ton of that stuff.
* 61 keys

What are the best options for a MIDI keyboard/controller meeting those criteria at a reasonable price?