I'd agree that the QSM's are nice, but they have had their fair share of issues as well. Pretty much all the newer technology diesels have been shown to have weaknesses. They are pushing a lot of ponies out of those smaller blocks and small problems can turn into big bills very quickly.
It's hard for me to argue with two new 8v92 reman engines and engine bays prepped for their entry, new mounts, exhaust all ready to go...etc
To each his own but we will be staying with the detroit iron on this project.
As to the old technology aspect... yeah, they are old, no doubt, but you have to admit they were advanced far beyond their time, roller rockers, common rail fuel system....etc. I kinda like the fact there there is no ECU or injector pump to deal with either.... The 8v92's are a proven solution that the boat is already setup for. To change at this point would be big $$$$$$ and also a big time consumer.