I don't know the MC30's but I've had MC225 and still have a MC240. I liked the C20 with the MC240, but I preferred a more modern preamp with the MC225. The phono stage was not so great in my C20. I did use an Audible Illusions Modulus 3A with the MC225 and it was extremely nice. If phono is important to you, I think you can do better than the C11 or C20. Later pre's are quieter too.
YMMV
hope this helps!
YMMV
hope this helps!