I'll add another vote for the Libec H22. I'm using it on a Gitzo 1348 MK2 CF legs. I was out on Washington's Olympic Peninsula all last week shooting with this setup and I've got to say that it is a revelation compared to the Manfrotto 701 I had before. Beautiful smooth pans and tilts and the leveling base is so nice!
Cheers,
Have heard great things about that Libec. Curious whether you had the 701RC2 or the new 701HDV?
For those who want a leveler, but don't have a bowl setup, you may want to check out the Acratech leveling base. Very nicely constructed and smooth functioning unit.
http://acratech.net/home.php?cat=2