OK - that's good. Makes it quite easy to suggest the Piaggero NP-V80 will be best. It is more like a digital piano than the other two, and has 'graded touch' a bit like a real piano, that the lower bass notes have a heavier 'feel' than the treble notes.
It is also 76 keys (against 61 keys for the other two, which is the standard portable keyboard size.) So having an extra octave means it can be played more a piano.
I don't know if you have studied the specification, but I'll outline the main features:
500 sounds
12 drum/FX kits
9 Reverbs
4 chorus
Dual voice/layer (so piano with strings orchestra, etc)
Keyboard split (so different sounds either end of keyboard)
165 accompaniment styles
Multi-finger (for left hand chords, so no 'single finger' mode)
User custom style (so you create one of your own)
305 song set up (I assume this means it sets the sounds etc for a song automatically)
Record 5 songs - 6 tracks = 5 melody + chords
Headphone socket
MIDI
USB to device (I'm not exactly sure what that means, but I think you can 'save' to USB stick.
6 watts X 2
Speakers: (12cmx6cm) X 2; 5cm X 2