The PXK's 420mm chainstays do not bode well for a 6' tall guy. Your heels will strike the panniers as you pedal. Get the Disc Trucker (460mm CSs) if you intend to carry panniers.

If you need to stay on budget, drop the Hope hubs+Stans rims. Why put a $500 wheelset on a $250 frameset?

Consider Deore 525 hubs (XT 756 cost twice as much but don't last twice as long) combined with Alex rims, like Surly specs on the complete bike. There are a number of inexpensive, wider rims that will work fine for a Surly DT build.