I was in the same situation - had a Crane with a Flushmate that was noisy and needed periodic maintenance. I finally put a Toto Soiree in its place and have been very happy. I like Toto so much that when I remodeled our two other bathrooms I went with Toto Ultramax II (name since changed - can't remember what to).
I strongly recommend getting a Toto with "double cyclone" technology - Terry has some video on this site showing how it works.
What is your budget for a toilet?