With 3 Model F 122-key terminal boards at various levels of modification, I have just about hit buckling spring nirvana, but if you are just using it straight up with no mods, the XT board really does have the nicest feel.
The layout is idiotic by modern standards, especially for somebody like me who uses arrow keys, home cluster, and numpad regularly and often, and never became comfortable with toggling NumLock off and on to suit my whims.