Hey all, I'm looking for a 600 to replace my old 250. I love the looks of the R6 and CBR600RR but don't like the comfort (particularly with the new R6). I'm not a big fan of the K5 onwards shape GSXR or Ninja. I have loved the K1-K3 shape GSXR's since new and would consider buying one over a new bike. I'm just wondering if anyone knows, from a technical, ride comfort and performance perspective, what the difference is between a K1/K2/K3 GSXR 600 VS a K7/K8...? Are they that far apart? Is the $8k vs $14k worth it enough to spend the extra money? Or should I just say screw it and go buy a Blackbird? Your comments and thoughts much appreciated. Rambler.