I am looking at upgrading from my Vortex Diamondback 8x42's. They are my first and only pair and have done pretty good but I just want something a little better quality. My price range is around $500.00 and I am open to buying another brand. I do want to stick with 8x42's as I will be backpacking quite a bit and glassing in low light. Who's got some solid suggestions here?