Test out what works best for you, if your around 8200-8300 when the shift occured then you times it right. Hard to say exactly when, b/c everyone reacts a bit differently from the time the light is perceived and the paddle is flicked. I tend to shift end of the yellows to avoid the rev limiter.
2008 E92 M3 Jerez Black,DCT,Fox Red ext,Prem,Tech,19", ipod/usb, CF roof and trim
2010 E91 328i Space Gray,Black int, M sport, most options
2007 Montego Blue 335i (retired)