When it comes to an IFV I'd think our primary concerns should be a modular weapon system, as well as amphibious capability. Anything that can't swim should probably be disqualified, if only because it then means we need some sort of additional transport capability to get across, and we do want as small a footprint as possible. 

Maybe a BTR-90 or BTR-94 would be better fits than a BMP-3, if you're looking to pull something out of the east.

And regardless, we have the issue of a ridiculously small capacity...