I have an 08 CBR1000RR & it is a great bike (except for it's thirst for oil). For <$100.00, you can regain the top-end power which adds ~7 - 10HP up to redline, which addresses the US drop-off in delivery after 10.5k. I am duly impressed with the S1000RR, but given the current economic clime, cannot justify the cost to upgrade. I'll probably drop some $$$ into suspension & perhaps lighter wheels instead. The Nissin master cylinder sucks (though braking is exceptional), so perhaps a Brembo upgrade is in order as well.