Hate to say it rich, but the FRS is the most capable winter vehicle I've ever driven. Beats out my work truck, my dad's truck, my mom's SUV, my old Camry, my old 626, the deuce and a half and the 14T truck I drive occasionally for the military.
Also, if you frequently use your back seats, I think your decision has been pretty much made for the STi. Though, like @
wparsons said, id be getting the WRX until the EJ has been bye felicia'd