I just bought the a600 and am looking for a better lens for portraits in particular, but as in general. I am underwhelmed by the 3.5-5.6 lens that came with the camera. I have a wide angle prime lens for my Nikon that was great for portraits, but the fixed nature of the lens is obviously limiting. I’m not a professional, so I’m really looking for one lens that could serve relatively well for low light, portrait and for everything else. I’m open to spending about $1,000 so long as it can mostly serve as my all around lens. I also love how small and light the Sony is compared to my Nikon, so would like to keep the bulk down if possible. Suggestions would be appreciated!