I have a '06 GSXR 600 and I absolutely love it. I recently test rode a '09 R6 at the Yamaha Demo Day at Brampton PowerSports.
I can honestly say that my stock GSXR was more powerfull and pulled a lot harder than the R6, I can only assume that the R6 has most of its power being delivered at a higher range than the GSXR so thats why it felt so docile compared to my bike.
The CBR has tons of upgraded parts and technology in the bike that is reflective in the price.
But in my opinion, the cheaper (older) technology on my GSXR is more than sufficient for street or even track day riding. Even being 5 years old my gsxr feels like it's going to buck my off if I WOT whereas the R6 just accellerated faster.
The suzuki's are the cheapest 600cc ss bikes out with some older technology i.e. manual steering dampner vs. Digital dampner Spring/shock suspension vs. whatever honda did now with the removal of the spring under the set.
Unless you are a professional racer, you do not need to pay for the latest and greatest technology because it is doesn't mean much on the street. The gsxr is definately the best bang for the buck, still outperforms........just ugly as hell now. lol