Alright, so my girlfriend just bought the 2005 Avid BB7's 160mm for me (I know, i'm one lucky grunt), but now there is the great deal on the 06 Avid BB7's on pricepoint. Are there any real SIGNIFICANT differences between the two models? The rotors have a different shape to them, but besides that, am I missing out on a feature that is on the 2006 and not the 2005's? Would it be worth it to exchange my 05's to 06's? If someone, anyone, could help me answer that, I'll buy them a box of cookies. Thanks!