What weighted blanket would you recommend..?

I've been struggling with sleep and finally decided to try a weighted blanket. Priorities: doesn't sleep hot, holds up after washing, sized for one adult who moves around. Budget $80-150.

I'm about 68kg so I need a 7-9kg blanket. Looking at Gravity, YnM, and Bearaby but the price range is all over the place.

Is the expensive one actually better, or is this diminishing returns after $80?