"do you really need the utility of a wagon/mini SUV?"
Yes..that's why I traded my RS for a Forester. I always wanted a WRX, but I'm not happy with the new design. I can live with a fast Forester that can still tow my dirt bike and go offroad.
"Because H-6 or not, the WRX is going to be faster, lighter , better handling (and 5 speed!)"
That goes without saying..but if you miss a shift, I might make you work for it :P