I liked the SR cast very much, especially Routh and Bosworth.
I really liked Routh and Bosworth too; they were just stuck with a terrible story/script in my opinion. On the other hand, I believe that Spacey is overrated as Luthor.
Cain is my favorite Clark / Superman; I never expected that to be the case when the initial press photos came out. For me, that first season of Lois and Clark is the pinnacle of live action Superman so far.