Onkyo TX-NR609 vs TX-NR515

Hi all 

I am planing on buying either the Onkyo TX-NR609 or TX-NR515. I understand from reading the reviews on here they are both very good receivers and are very similar certaintly in terms of sound quality. I would like to know exactly what are the differences between the 2 and is it worth getting the 609 over the 515 considering I can get the 609 a little cheaper. I know it sounds ridiculous but the 609 has relative voulme display and the volume knob lights up and I really like these features, can anyone confirm these are available on the 515?