Try 455. I used mine today a d it wouldn't register the bottom or show much without turning surface clarity off which made 455 cluttered and too trashy on the screen.
I use 455 about 95% of the time because it picks up more and easier. 800 will give cleaner defined structure if you adjust it right.
I found 56 on contrast is best for 455 and 72 and up for 800.

