I know a lot of you guys are more into the keyboard action of synths than I, but the difference I've noticed between the previous Yamaha's and Korg's is minimal. Most keyboards I've played in this price range seem to play about the same. I'm sure a lot of you could tell the difference, which might sway you against a particular keyboard. The Tyros 4 probably does have a better feeling key bed...but they are still going for 3 to 4k
on EBay. To me it's a little like guitars. To play a real nice Strat and then switch over to a Les Paul...the feel is going to be awkward at first, but you eventually adapt. Seems that some of that logic applies to key beds as well.

Jingleman