dunno, ive had a nokia 6620 for 2.5yrs and loved it. i got used to a larger phone and having very similar applications to a smart phone. i had the 8125 for about 2 weeks, until the 8525 came into stock. they are both very similar, but the key layout is a little smaller on the 85, faster processor, wheel, 2mp camera, other misc stuff

i only paid $50 more for the 8525 due to a hookup and contract renewal so it was worth it to me for those features. if your gonna pay retail or close to it, it might not be worth it over the 81.

i like it though, i wish it was a little less bulky and had better battry life (2 days generally) , but it flies with cingular's 3g network, wi-fi is sweet, ton's of free applications, it doesnt have slowdown. i think ill enjoy it for some time