I've been looking to replace my cheap binoculars as I'm getting more into bird watching and my old £100 steiner ones aren't up to the job. After reading loads of reviews I decided that I would buy the Monarch 7 8x42 for around £350. But then I noticed I can get the Monarch 7 8x30 for more than one hundred pounds less. So is it worth shelling out that much more when as I understand it, only the low light performance will be better? Would that be the only difference? Any advice will be welcomed as all I know is what I have learnt from reviews and there is no local retailers to test them.