I've got an SC with one of each, I rebuilt one shifter with slightly higher price than the $20 kit. Went together fine works like a charm, went to rebuild another one withb the cheaper kit and after assembling it the same way it dodn't have the throw necessary to use. Since I don't need it for a car I've just left it alone for now. IIRC the kits don't include the spring washers, just large thick washers.
I agree at $250+ for the B&M I'd sure rebuild the OE part first to see if it satisfies, but if you got the jack and you want the shiznit pop for the much better B&M part!