The Faderport actually can be made to work with Logic Pro X, you just need to find the 64-bit midi device plugin and manually move it into the Logic app folder via "show package contents". You'll have to do this after every update as well. Its been a while since I looked this up but its out there in a support post by Presonus somewhere.
The Frontier Alpha Track also can be made to work, and also requires some diligent googling and workarounds.
I recently changed from a Faderport to the Alpha Track and I love it. It doesn't require an external power supply and displays a lot more feedback about what is going on. The Faderport was great though too, and easier to find.