I have the G5 that I purchased nearly a year ago along with the 14-45mm and 45-150mm. Probably 75% of my pictures are of the kids(2,7,9)/family at home or other settings. This will also include some sports such as soccer, basketball, baseball from time to time. The remaining is going to be mostly vacation landscape and classic cars. I also anticipate getting into more landscape/nature type shooting, but that will probably be much later down the road when I actually have some free time. So far I'm pretty content with the kit lenses, but I am thinking of adding another lens. I still consider myself a noobie at this point, so I'm not sure what I should go far. At this point I'm looking for the best bang for my buck (trying to stay less than $300 used/new) in a good lens. For now this would be my only lens purchase for a while. What would the experts suggest as the best one to expand my arsenal?