Hi Joe,

First of all, in my opinion, key feel and response are very personal and subjective.

I agree with you totally that the Yamaha FSX has a "very nice feel"...in my opinion, it is the best semi-weighted action available today, on any arranger or workstation, and although I really liked the
light and nicely balanced feel of the mid-range Yamaha PSR line, after spending some quality time on the Tyros4, I have changed my mind, and I now prefer the semi-weighted FSX.

For me, weighted, hammer action keys are only really necessary if I am playing solo piano, and, let me add, I want 88 of them...not 76, although, I suppose I could work around the latter if necessary. Playing sounds other than piano is not a problem, for me, as working with weighted action builds up hand/finger strength and speed.

Since you are considering "adding" a workstation, it might be in your favor to go with 76/88 weighted, as you already have a great feeling 61 note semi-weighted instrument, and with MIDI you can enjoy the benefits of both actions.

Regarding finding the weighted action " fatiguing to play over the long haul", it would really depend on how much time you spent on the instrument. For occasional use, you might find it a bit wearing, but if it's more your primary instrument, your hands and fingers will become used to it.

Nothing beats a weighted action for piano work, in my opinion and experience, but, if you're not a piano player who now plays synths and arranger/workstations, but more of a general "keyboard" player, semi-weighted might be the best overall choice.

Ian