What's the absolute best all-around zoom lens for the Panasonic S5II right now? I'm trying to figure out my kit before a trip to Japan next month and I'm stuck between a few options. I read that the kit 20-60mm is actually decent for the price but that f5.6 aperture seems way too slow for night shots in Tokyo. Then I saw the Sigma 28-70mm f2.8 is really light but people say the autofocus isnt as snappy on the S5II compared to native glass. I have about 900 bucks to spend and really need something that handles handheld video well since I dont want to carry a gimbal everywhere. Should I just save up for the 24-105 or is there a better middle ground im missing?