hawgdriver, that's a difficult choice.
The CN42 and CN33 both utilise the same 'Progressive Harmonic Imaging' tone generator, so should sound largely identical through a good pair of headphones.
However the CN33 features the brand new RH action with let-off simulation and Ivory Touch key surfaces - in terms of keyboard action it's definitely the superior model.
But then, with the CN42 you're getting a more powerful speaker system, many more sounds, drum rhythms, 16-track SMF USB recorder, and twice the polyphony.
Yes, that's a really difficult choice, but I think it largely depends on your priorities. If having the latest keyboard action is more important than additional features, go for the CN33.
Opting for the CA63 would of course give you the best of both worlds, with an even more realistic keyboard action, higher quality sounds, and convenient features such as MP3 audio recording. However, it's obviously quite a lot more money to invest in - especially if you are planning to upgrade to an RX-2 in a few years.
One final suggestion might be to mention your future plans of purchasing an acoustic to the dealer. If you do decide to upgrade to an RX-2 within 5-10 years or so, they may be prepared to offer an attractive part-exchange deal on the digital piano.
I hope this helps - good luck with your purchase.
ps. Nice 'Office' reference by the way...