Bandet
You should check out scalemates.com
It does a great flow chart of what kit is new, reboxed, and all that, for every model.
Just a caution, though-Scalemates' info, like that on any other wiki-type site, is only as good as the person who enters it. I consider it reliable, but also try to find an additional, confirming source, if I can.
Bandet
General rule of thumb, when you are looking for a "good" model, the more recent the tooling the better the model.
An exception would be any of the classic companies, whose molds were first used decades ago. The examples I think of the most are Revell and Monogram kits, such as Monogram's P-61. More recent boxings show a lot of flash, and more fit issues, than when the kit was first released.