It would help to know what requirements mikeosborne13 has for his portable keyboard. Ability to control/layer many instrument modules and effects or just Pianoteq standalone? Lightweight or just portable?
I also chose the Casio PX-150 for my portable keyboard (current model is PX-160), but I use it only to control the standalone Pianoteq software. I switch among Pianoteq instruments or presets between songs only, not in the midst of a song, so it is easy enough just to switch these on my laptop, to keep things simple. For the most part, as the pianist in jazz bands, I use a single acoustic piano preset, without switching presets or instruments. In this role, the Casio PX-150 has been fine. The pros and cons of the PX-150 have been much discussed in other threads, but for me the relevant features are its light weight (11 kg = 25 lbs), low price, and relatively good action. It initially bothered me that the keys bottom out on rubber bumpers instead of felt, but I've adjusted to that.
Of course, I'd prefer a portable keyboard more like my acoustic piano, with longer-pivot (wood?) keys and a heavier action, but currently that would mean greater weight and much greater expense.