I totally agree, my friend.

I thought the PA-50 was very impressive, especially considering the price.

Here's how I see it...

I don't need a keyboard of $5000 to sound good, but I want a keyboard of $5000 because of the overall increase in sound quality, and, I want the best I can afford.

I played a PSR-S910 all last year, and it was a fine instrument, but after playing the Tyros4, I am very impressed and attracted to the extra sound quality.

I would say that sometimes the difference in price from a mid-range keyboard to a top-line keyboard is not always justified, because the increase in sound quality is not directly porportional, but, in the case of the Tyros4 vs. the PSR-S910 (or PA-50), in my opinion, it is worth the extra cost.

Having said that, if I was unable to afford a top-line instrument, or I just didn't want to spend the kind of money it takes to get one, I'd be perfectly happy playing an PSR-S910 for all my musical needs.

Ian