Neck-through guitars require a close look at the ‘mains’ or outer laminates used in the neck. These are the largest pieces of wood in the neck, and they will have the greatest effect on the overall tone of the guitar vs. a bolt-on where the body has about a 50% effect on tone. A neck-thru requires more hours of labor to construct and is more difficult to aquire the proper length laminates due to the extra length over the bolt-on.
Another effect of the "neck-thru" is that of sustain. The sustain has a more linear decay from the point of attack vs. the bolt-on whereby the attack sounds faster and louder with an initial quick decay then tappering off to a more even and linear decay from that point on.
Pricing for Piezo / MIDI can be found on the Warr Guitars "Prices" page.