[mnem]

Interestingly, he seems to use multiple cameras. For example, the alley shot as taken with a Lumix GF1: http://www.flickr.com/photos/sasurau/3944365957/ - personally I find the feeling of the Lumix one far more emotive in this case.

I totally agree that it's not the price of your equipment though, it's what you do with it - most of the time. Photography has a great many reasons to occur and there are aspects which most definitely benefit from higher quality equipment. For example, nature macro photography (some beautiful examples from the same photographer above: https://www.flickr.com/photos/sasurau/sets/72157631002090680... ). I guess the more you are looking for "The Decisive Moment", the less raw quality matters. Although, again, something like studio photography is likely to be a balance of quality and decisive moments.

Ultimately, unless you're getting most of your income from the photographs, just make sure however you're doing it you're having fun and enjoying it :)