I've grown these too. I like Brandywine. It's large and tasty to me but too stingy for the disease it gets. Takes too much attention for what it gives. I found the others ok but nothing special. Last few years DH and I really love Black Krim. I start 1-2 extra early so these are usually the first I get. Much shorter days to harvest than most heirlooms. I save these seeds every year. This year I grew 4 Big Beef. First hybrid I've grown in years. Large, tasty and I'm loving it to can. I can my Black Krims too.Varieties that have NOT made me say wow include: Mortgage Lifter (3rd year, won't grow it again), Brandywine, Cherokee Purple.
I've not grown many winter squash. I usually do pumpkins.I'm giving up on butternut squash for a few years. Maybe I'll grow an acorn type next year.
Have you tried the bush type butternuts? I would think they were shorter season. Might would work in your area?
I did grow these a couple years ago. They tried to take over the yard. They took quite a while. I cooked them as a pasta sub with a sausage/tomato sauce. We found them ok but not enough to grow again. The chickens thought the were great! They kept pretty good too.I hope the spaghetti squash that is in the freezer is good for something.