Those wattage ratings are pretty meaningless. 2 channel driven @ 8 ohms is the one I pay most attention to. As far as "pushing all 9", unless you're a fan of playing sine waves in all channel stereo mode that's a scenario that you'd almost never experience.
Did you play around with the spl calculator I posted earlier?
It takes a lot of watts to make any kind of significant difference. If I were looking to amp my fronts I would want to get as close to doubling my power as possible (make it worth it), and if budget is too tight then I'd get the smaller amp and put it on surround or atmos duty.