Winters Racing shifter VS B&M Quick Silver VS Hurst Promatic 2

The Promatics seem to always need lubed to work right.
(mine does anyway)

About once a month I have to shoot it with a graphite spray that I use for stuff like that, or it doesn't catch the cog for the third gear manual upshift on the first try. (does on the second attempt like you said)
I have NEVER had any issues where it moved itself from one position/gear to another though.

Personally I think you would be a lot happier with one of the others like you are already seeming to be leaning towards.