Back on topic...
if you like the look of 8-ply mats, then cutting your own is almost a requirement. Many frame shops won't do it, and if they do, they charge an arm and a leg for the service (I've heard $20 per window, if you supply the mat board, and they get to keep the leftovers). Back a few years ago, I was prepping for a big show, and had to frame a dozen pieces, all 20x24" outside dimensions. I found a really good deal on a Logan mat cutter on Ebay (new in box, at essentially wholesale cost), and snapped it up. Between that and the order I placed with American Frame, I saved enough on that job to pay for the cutter there and then. Shopping the framing job out would have run me at least $100 a frame, maybe $150. The materials (mat board, frames, glass, foamcore, hardware) cost me $550, and the cutter was another $350. So, I spent $900 for the show, instead of the $1200-1800 it would have cost to have it done professionally. I can burn through a lot of my own personal time for $900.