Have you tried the SA Sonar Int/S3/S5 line? I have it in a 10. I've been impressed, but I've mostly been fishing early/late and haven't seen how it reacts to a hot deck. It is textured and will cut you. Big flies/fish haven't been a problem.
I like the old wet tip express (now the sonar 25) in small/still water, but it hinges on the retrieve in big, moving water. The Sonar 30 is better, but it will get gummy. I fished it all winter; it's going back in the gear closet till fall. Horses for courses, but none are anywhere near perfect.
I'm intrigued by Wulff's new integrated sinking line.