I do not have first hand experience but the couple of people that I know who have the SX SE love the bike and the reviews I've read are stellar.
If you're a power junkie, these bikes respond unbelievably to a flash and a mid pipe and slip on. Way over 200hp at the wheel. However, a look at the dyno charts comparing my friend's flashed SX and my flashed/full exhaust ZX-14R is quite revealing. His bike made close to 240hp compared to mine at 200hp. BUT, the power of the SX was above 10K rpm. Under that, the difference in hp and torque is significant, with the 14R well up on the SX. The windscreen issue, if any, on the 14R is easily rectified with an aftermarket screen.
That being said, I certainly wouldn't mind having an SX. Bags, more upright riding position, a little less weight, etc. But so far, with 49K miles on the 14R, it is a superstar. More comfortable than any bike I've owned (around 70 of them), including a bunch of Beemers.
Ft. Lauderdale, FL
'12 ZX-14R, Akra header, TBR Carbon slip-ons, Woolich flash