Hi guys, it's 1 year that I'm using my GX1 with great satisfaction with my pancake 20mm and 14-45 pana zoom. But now I need to improve my set-up. Wit a super wide 7.5 samyang and especially a tele. What can I chose? From the market there are a lot of solutions 45-200....45-175....and many others. My interests are un sport and animal photography something fast would be the best... Any suggestion? Pro and cons ?