Just pre-ordered the G3258 for my fiancé's system and yes, I got a Z97 motherboard. ASUS just announced they're allowing overclocking on non-Z boards with a BIOS update, but I figured that the Z97 board had all the features and flexibility that I wanted, but I didn't need an i5 or i7 for her to watch Netflix. I will play with the multiplier myself to see what's what. Will give feedback... It's replacing her FX-6100 which is a steaming pile of... well you get the point.
And at the same time I ordered another Z97 and i7-4790k to replace my aging i7-870 and ASUS P7P55DE-LX (which is damaged, but still working). Going to replace the Lynnfield with something fast.