I am having trouble finding info about these 2 keyboards. Is it a 88 key weighted keyboard? How does it compare to the keyboard for the Yamaha P155?

http://usa.yamaha.com/products/musical-instruments/keyboards/stagepianos/cp/cp1/

NW-Stage
Weighted, wooden keyboard.
Lighter feeling than P155. Much better, IMO.

I played a CP5 today and I really enjoyed it. One of the best actions in a keyboard and the S6 sample is really awesome. The NW-Stage wooden action is top notch. It's too bad it's so heavy. I would love to have that action in my NP2.

NW Stage = best ever action on a keyboard

Sounds great, but I have a concern, are the 88 keys graded from heavy weight on the bass end to lighter on the treble end? How does that affect my playing?

Not graded. It doesn't matter. It still feels a whole lot better than most graded keyboards. The aspects of an action that matter most can't be found on spec sheets.

What a coincidence ! I spent almost an hour this morning at the Pasadena GC playing the CP5 and the Kronos 88. I hadn't touched the CP5 in almost a year since I sold it.

The "German grand" piano sample on the Korg sounds thicker and in your face, but the overall feeling was closer to a legit piano more on the CP5. I was just way more relaxed and comfortable. I really regret selling it and I'm actually thinking of getting another one ...hopefully used off CL and hopefully in new condition.

There was just something about that keyboard and the CF sample that really connected with me. Kinda like the way people talk about that organic feeling with the Nord Piano, that's what I felt with the CP5.