I haven't even seriously considered changing wheels because I really like the 4.6is wheels. I don't think the 4.8's are any nicer, so I don't know why you'd go to the trouble/expense!

__________________
Bruce
2003 "Dinan S3" X5 4.6is - Estoril Blue (450hp w/ supercharger)
2008 E60 M5 - Monaco Blue
www.UnderwaterReflections.com
www.seattleyates.com