I'm a BIG fan of INTERIORS!!!!
If a subject I like doesn't have an interior, I research and build it... maybe that's why I have so may unfinished kits
???
Anyhoo, based on my love for interiors, I'd choose the Academy Tiger I, which can be opened up very nicely. M113's are good little bread boxes and can be changed into innumerable vehicle roles and types, so those are cool too... as is the old Tamiya 1/25 scale Centurion..
But, if I were to choose a lot of view power right out of the box, without doing any scratch building or after marketing, I'd choose either the Tiger or Big Centurion. Nothing like an open hatch with something other than dead space showing!
ON the other hand, I've made more Stuarts (M1-M5A1) than any other kits and have patterns, molds and resin copies of most of the interior details on those. After all, I'm a BIG Stuart fan
!
Ron.