Bigfoot, Real Geese and GHG Shells...

Bigfoot give size and scope + are indestructible (all but)

Real Geese give movement

GHG shells can give #s at a reasonable price + motion (if on a stick) and the sleepers are nice in the pocket or on a really cold day

All three have their place in any spread IMHO. Ratios may change depending on the situation but I would rather have some of each than all of one.