Hi. Newbie here. Having a little hard time deciding between the d90 and 50d. Due to my limited budget now, I can only afford to go for the d90 with a tamron 17-50 or a 50d with the 18-55 kit lens and a 50mm f/1.8. Which way will make more sense? I have no issue with size and weight. Which will give better low light performance for stationary objects? I read that the 50d has microfocus adjustment and peripheral illumination correction, does these matter?
Will one be able to withstand human sweat and non-petrolum grade oil better? Is one more scratch resistance than the other?