All are good bikes. I'd probably rate them as so: FZ1 comfy, ride from here to FL only stopping for gas. Good 2up bike. Sport touring classed but well versed. Z1000 This is a close second. Great hooligan bike. Lack of fairing makes it not the best for expressway riding. SV V-twins sound awesome and great bike off the line. Most usable power of the 3. Least comfy of the 3. All the bikes will have plenty of aftermarket parts. The SV you can change out the forks and front end with a GSXR's. Again all good bikes just depends on what you want it for and what fits YOU the best.