Not exactly on topic, but the Xenios gives you a number of the features mentioned.

The closest to the 2 manual Nord is probably the Wersi Xenios, which has a 10” touch screen and comes in at just under 50lb.
Combine the above with the VB3 VSTi for your authentic Hammond emulation.
For those that want sounds that are as close to real as you can get, drop in the Free Kontakt 4 Player VSTi and buy just the instruments you want, (There are a boatload out there) and which can also be used in styles. (Including Yamaha styles)
It also has style compose pre-sets (Step time) where you can pre-program your own chords fills breaks etc., and combine with any style you choose. (It also allows you to still use fills variations and chords etc. live, to allow flexibility)(Style compose pre-sets are independent of other pre-sets, unless specifically saved in them)
You can store up to 9 styles per registration pre-set, and if you add the Rhythm designer you get a 4 track Arpeggio/loopier (You can load your own loops if you want) which can be used in tandem with the arranger, independent of the arranger or a combination of the 2. (You can use VSTi sounds for your arpeggios/loops if required)
Downside
It only has a 49 note upper, sliders instead of drawbars and costs €6950 http://www.wersimusic.com/xenios.html

Bill