I have been using a similar system for the past 18 months.
Twinset Tyros above + NP30 tight below. (No Bass Pedals)
The Tyros now being a full keyboard allows me to have 3 voice zones over the Tyros (the NP30 is driving the T2 Left Hand Styles & Left Voices over it's full length) Works well for me and it does look impressive...Lol.