I prefer the jet black bezel insert on the 2500 compared to the "washed out" new ceramic bezel on the 8500. The 2500 dial looks a charcoal greyish black. Although some may prefer applied numerals and logo on the 8500, I prefer painted ones in this case as it pops more from the matt dial.
Recently I added a Raynox Super Macro conversion lens to my GF1 as the in-built macro mode is limiting how close I can get to the object. The close-up shots turn out quite satisfactory for an simple amateur like me.