I've got a BK-9 coming in about 3 weeks. I really like the the 76 keys. It really lets me stretch out when playing the piano patches. I hope the feel of the keyboard is a little bit more robust than the BK-5 and BK-3. Not that they are bad but I could use a little more weight in the action.

I had a Yamaha PSR-S950 and a Korg PA-600 and got rid of them both. They had absolutely the worst keyboard action I have ever played on. Very cheap in my opinion. I'm a piano player and have gotten to prefer a heavier action while playing piano patches. 61 keys are also somewhat confining when it comes to really digging into an acoustic piano solo.