motorized equatorial mount tracking

Hi all,
I'm interested in tracking accuracies found in high-end off-the-shelf
telescope mounts, principally equatorial mounts. Are there any
knock-your-socks-off winners in this field? I've seen reference to high
performance by Takahashi, but am also interested in any positive experiences
with Celestron, Meade, Konus, Lomo, etc...I plan to utilize TPoint also, in
the hopes of increasing accuracy even further...