Suggestions for Summer bag for 6'5"

I am looking for bag/quilt for the summer where I don't expect the low to be lower than the mid 50s. I currently have a 20 degree bag and colder winter bag, and am looking for something that will pack small and be lighter for summer trips. I just started looking and found the Zpacks summer quilt which is a little under 11 oz and looks like it should pack to under 4 liters in the 40F long/broad version.

Any experience with this quilt and any others that I should be looking at?