Personally I was never happy with the movement of the stick itself. It's sticky for some reason. I even tried greasing the pressure cone but it made no difference. The movement of the Logitech Extreme is far better, but like you said lacks in button (HOTAS) availability.
The throttle movement is nice, the rudder twist is good, but the stick movement could be better. All in all is a great upgrade from what you're using. The slider, rotary, MFD, button, HAT, and mode options simply can't be beat. If you want mine I will sell it for whatever this bid closes for:
http://www.ebay.com/itm/Saitek-X52-Pro-Flight-Controller-Joystick-Throttle-Set-/320811465124?pt=LH_DefaultDomain_0&hash=item4ab1da79a4
... plus shipping.