Of all of the releases so far, I think the Vf-0A is the best output by Yamato to date. It doesn't have any of loose joints that plagued the Vf-0S. Gorgeous transformation. Choice of Skull, bunny, or Wolfpack stickers. Fastpacks attached with magnets. Then you add the fact that the VF-0A and VF-0S look better than the standard 1/48's IMO. The only issues that were found with my Yf-19 were the misaligned gunpod and the shoulder tab that has a tendency to fall out when transforming. Neither of these were big issues with me so they were a non issue.
The 1/48's saving graces are that all of the later releases are QC problem free, You can get GBP armor for them all, and you have several choices of fast packs.
I don't think its humanly possible to limit oneself to only one Yamato. I suggest that one own atleast one of each ( 1/60 yf-19 , a 1/48 , and a 1/60 zero)