I picked 4 even though there was one time I removed an SB, and that was just because on my old computer it couldn't handle it and I wanted to play the map. But now that I have a much better computer, I don't remove anything really, partly because I find my sight to be rather sharp (with my glasses on) and I don't need much contrast to distinguish things or get that distracted to SBs (unless I'm paying attention to it, but when I'm trying I just tune it out)