Hi I've recently purchased an Olympus E-420 dSLR with a 14-42mm lens and 40-200mm lens (as comes with the camera). I do a bit of band photography and want a large aperture, fast lens. The only easy one I can find available is the pancake 25mm f2.8, however I wonder about it's quality, and if it is a considerable difference to my 14-42mm which starts at f3.5. Compared to the Canon 50mm f1.8 it's about double the price. I've also considered purchasing an adapter kid, (perhaps OM-4/3)so that I can buy some older Zuiko lenses, or have a wider range. I'm from Australia and here, the 2.8 is around $300 ($360 USD), so i'm a bit uncertain what the best path to go is. Any help would be greatly appreciated.