I would caution against the use of Nema 23 motors. They are not needed for a printer of that modest size, but they will cause more vibration, and unless you use a separate higher voltage power supply and expensive drivers, they will have a lower maximum travel speed because of their high inductance.
There is a thread about Nema 23 vs.17 in the Duet WiFi forum at www.duet3d.com, in which I went through the calculations.
Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod
Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].