the new sport models have a drop of 15mm so i dont think that there will a great difference in normal everyday driving, with regards to the S and SE wheels there is a difference in ride quality - SE is stiffer as for road noise it all depends on the road surface - but I do know that the bridgestones are quieter than the dunlops. - if the dealer is serious and interested in you as a potential customer then there shouldnt be a prob with having a test drive on all 3. With regards to the colour, the darker colours are harder to look after as they show all the marks etc but when it is clean its as if ur looking in a mirror, on the silver you can have a lot of dust/dirt and it doesnt look to bad also when you get the paint chips they are not that obvious, whichever colour you get i would suggest having a look into a product called X-pel - its a clear plastic film that goes on the front edge of the bonnet - since i fitted mine i have only had 1 chip in 2 years, would easily recomend it to anyone without hesitation.