I always preferred the F which was always the more expensive to get on the secondary market, and you needed 2 for Emerald Force.
As for the Bandai 21,ill get one because I'm a completioniat but it won't be replacing my Yamato.
That's a pretty common refrain because no wonder what Bandai does, they always halfass something which makes their toy slightly inferior to the old Yamato imo, like the DX VF-1 vs 1/60 Yamato.