It really depends on the type of action and control you're looking for. If you're looking for a keyboard controller that has (in my opinion) the best piano action, then there's never been anything like the Roland A-80. I just picked up my second one used for $425 on Craigslist. For playing piano, there's nothing even close. Then pair it up with a nice sound module. It doesn't have the "zip strip" ribbon, but it does have both the wheels and joystick for pitch bend and modulation, so you can use either one. It also has aftertouch, tons of programmable options and controls, buttons, sliders, etc.
I picked up a B-stock M-Audio Keystation 88-es for playing stuff that requires lighter action, like organ, synth, or other types of sampled instruments.
Hope this helps!