Hello, New member here and also new/prospective M4/3 system owner. I am about to purchase the Panasonic GX8. I'd like to start playing with the video features, I feel like I may have use for the 4k photo feature for family action shots, and I also like the idea of the dual IS capability. In any event, I am planning to also purchase the Panasonic 12-35/2.8 as my main walk around lens. It seems like the best overall option for this purpose. My question is for indoor photos, potentially without flash, of moving subjects such as kids playing (not super active kids, for what it's worth), is there a benefit to using something like the new 25/1.7 lens (or even the 25/1.4) vs. the zoom. Basically, I am struggling to figure out if the dual IS feature of the zoom completely offsets the aperture advantage of the primes when taking handheld photos indoors of moving subjects. I do realize that the GX8 IBIS does offer 2-3 stops of IS for the primes as well. Anyway, just seeking some authoritive/experienced advice. thank you!!!