(first time poster--been lurking too long)
I believe "TOW-ER" is the old designation for TOW 2B Aero, which has some sort of redesign of the nose and a longer guidance wire for a range of 4.5 km. It also has a flyover top attack profile and a dual-EFP warhead. There are also wireless-guided versions available.
All that said, I'd much rather see a more advanced missile system in OMFV.