xsperf, i think it goes back to the fact it is a 525i. it's got a lot of excess weight that would slow it down from a 325.
my expertise? no expert by any means. there's tons of people that have a lot more experience and know a lot more about it than i do. having said that i enjoy learning as much as i can about them. as one of my professors said, if you spend 1 hour a day on a subject for 1 year, you'll be an expert on the subject. perhaps you are an expert on unitedbimmer