Buying Advice: SE k810i vs Nokia N73

This is my first post in this section, on buying my first mobile phone. I've narrowed down my options to k810i and N73. I'd like to know the performance of those phones in the following

Camera: Photos and videos
Sound quality: both earpiece and loudspeaker ( I'm not a big music fan - so I'm refering only to the voice quality here)
Speed and navigation
Keypad comfort

-----------

N73 has EDGE. Do mobile operators in India support EDGE? Does it have any advantage over 3G? Do mobile operators here have 3G support?

-----------