Man you go away on a mini vacation and someone actually reads a post of mine and has a question. . . Yow!
Sorry for the late reply. . .
My P16 has an Ed Brown 10mm barrel (shorter wait then BarSto and something you should be able to fit if any fitting is required--mine did need fitting and I didn't want to take the lugs off so Ed Brown did the fitting for $75 bux and in 3 business days) and it has been fine. Accuracy is great and there has been no malfs whatsoever. I'm using a 24lb Wolff recoil spring (the 26lb recoil spring was beating certain ammo to death with the trips up the feed ramp--that ammo is the Georgia Arms ammo) and I have put +10% mag springs in the tubes to ensure feeding.
IMNSHO, I'd skip that 40 Super. Looking at the #s, there's really only an advantage in the 40S using the lightweight rounds (135gr). When looking at the 200gr loading, there's hardly a difference between the 40S and the 10mm in the velocity category, but you will be using more powder to get an extra 50fps and losing at least one round from magazine capacity.
Unless you are cooking your own brewed magic, then you'll by paying through nose for the Triton Ammo while there's 10mm akimbo!
Now if you have a P14 rather then a P16 and you extra umph, I'd say that the 40 S or the 400 CB would the logical way to go.
Although I wonder, if a 10mm barrel cut to fit into the P14 breechface would function correctly? You see these 10mm/.40S&W pistols being rechambered down to 9mm/9x23.
I recall that there was a single stacked 1911 with both a .45acp and a 10mm top end reviewed in Combat Handguns a bit ago and there happened to be only a few failure to go fully into battery malfs.
Derek