Frig, I have the exact same sheet set you have and have been overall fairly pleased. Previously, I had a 600 ct set I bought at Bed, Bath and Beyond, those were sateen and I liked those as well. Eventually, the bottom sheet wore out from being stretched and got a big ol rip. They were labeled "Sateen" and I think they were softer than what I have now.
We have Speed Queen toploaders here, and it definitely fills the machine up, although I don't wash sheets with anything else in any event. They do wrinkle, but I find they settle down once on the bed.
They are crisp, which I think they're supposed to be, but I don't find them scratchy or uncomfortable (I do use fabric softener).
I think a person can get carried away with the hype of a high thread count, in spite of my liking these. I remember when 200-250 was the gold standard, and they were certainly more than acceptably comfortable.