If you're going to do a bit of low light shooting, then I'd very strongly advise you to invest in some faster primes. They're not crazy expensive, they're small & light, & they AF quickly & accurately. Because of the larger apertures. Especially if your subject is moving. No need for the larger chunky Oly Pro f/1.2's, I think the sweet spot in m4/3 is the f/1.4-1.8 lenses. I use f/2.8 lenses as my normal daytime lenses, they still give a slightly softer background at 2.8, & aren't too bulky or heavy. If you really want to spend up on a zoom for low light, then the way to go would be the Panasonic Leica 10-25 f/1.7, & it's bigger brother the 25-50 f/1.7 Not cheap, but still around the same price as a collection of similar primes.