The Level 10 transmission I put in cost $5000. Installed, programmed, OTD.
But that included replacement of the trashed transmission mount, new lines, and a couple other odds and ends plus the reprogramming of the ECU for the new trans. So, the straight-up cost of a Level 10 versus a stocker replacement are about equivalent in price if that's all you have done.
On their site, the Level 10 for the Titan is $3998. Compare that to $3500 for a stocker, and it's a no-brainer.
Bottomline: The Level 10 is 50 times the transmission the stock one is, even in rebuilt condition. And no, you're not saving any $$$ to speak of. You're just getting cheaper junk for about the same price. Do yourself a favor and at least give Level 10 a shout. You have nothing to lose but a few minutes of your time.