I've used all three. My top two are molten and eclipse. Liberty needs to get updated (IMO), it needs to be fixed up a little. I've had only like 1 or 2 problems with eclipse and it's nothing major, I can live with them; Eclipse makes up for it with speed. I'm running the 2.3.4 eclipse. Too lazy to SBF and i love it. Otherwise, molten is a great choice as well. Its up to you.
My suggestion is to flash the SPEEDY V7 script and the build.prop. They really make the phone so much better.
Hope this helps =]
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