Folks, need some opinion and advice for a wheel build.

New commuting bike frame is basically a cross bike and I might even use it as such in the future. However for the moment it will be all flat road.

Hubs:
Rear is a Nexus 8sp IGH, 36 hole
Front is an Ultegra, 32 hole

Rims:
Velocilty Dyad

Spokes? HELP
Should I go straight gauge spokes or a butted spoke?
Will be going 3x for a stronger and m ore conventional build.