Tamiya Shermans all pretty much fall together, and all have the same slight omissions and inaccuracies. Having said that, there's nothing in any of them that can't be fixed or upgraded with a little modeling.
I would say the worst of the bunch, as far as accuracy goes, is the Jumbo, but you can pick one up for $5 at a show these days.
Geez, Sherman variants..... I think I have about ten in the display case, another half dozen or more in a box, no two the same. Yeah, 'tis a slippery slope indeed.