I started with a Paxton Novi 2000 and then a 2.2 KB. Having had both, I highly recommend the Kenne Bell. I recently ran a 9.67 at 139 mph with the 2.2 KB at a race weight of 3250. If you plan to build your bottom end, get the 2.6 KB. Otherwise, get the 2.1 KB. I recently got a 2.8 KB and...