The Winchester SX3 / Browning Gold is one of the finest semi-auto shotguns made.
As for speed?
It doesn't matter how fast the action will cycle if it takes you longer to get the barrel back on target after recoil moves it. Your gun is one of the softest shooting gas operated shotguns and as far as I know, there have been no "recent improvement" other then wild advertising claims by other manufactures that their latest & greatest design is better then any other shotgun ever made.
As for accuracy?
Any of your three guns are probably equally accurate and as accurate as any other shotgun.
Shotgun accuracy depends entirely on how well the gun fits you.
Your SX3 came with 3 stock shims and 2 butt-plate spacers to adjust length of pull, drop at heel, and cast-off.
It can be adjusted to fit anyone well by using the shims & spacers.
Bottom line is, you can't buy shotgun accuracy.
It comes with a properly fitted stock and lots of practice.
Complete instructions on stock adjsutments in the Owners Manual page 22, 23, 24.
http://media.winchesterguns.com/pdf/om/06_013_sx3.pdf
rc
