I'm old school also, and as I have boxes of windscreen wiper motors and 12v fan motors just hanging around taking up space, can't see the point in not using them. I've got some Bosch 12v x 12 pole fan motors in the Sirius Cove and they are some of the best I have ever found. Not easy to get these days, but very smooth runners.
I also belt drive my models, so nice and quiet, and you can lower your prop speeds using higher motor revs for greater efficiency. Geared motors like the Robbe are good, but growl. I have one in a small tug and it works well, but not as quiet as I like.
Ian.