Guys your just going to confuse him...
when preping graphics for the web
I usually use 720 x 480 as the target size at 72 dpi
that's a 10"x 6.5" web image
jpg compressed less than 76% starts looking pretty bad.
that file is around 200k which is to big for this site, so you will need to take it even smaller
650 x 433 is under 150k
hope that helps