Being philosophical about the 9mm ...
Well, I'm in late on this thread, but whether a full-size pistol or not, one reason frequently cited by 9mm fans, right after "it's-easy-to-shoot" and "ammo-is-cheap," is that the typical hi-cap 9mm mag is more "hi-cap" than the mags of competing calibers (pre-ban Glocks excepted). Apparently, high capacity is an "advantage" here because either (a) 9mm users expect to miss alot or (b) the extra rounds on tap are a tacit admission upfront that they lack confidence in the 9mm's ability to immediately incapacitate a hostile BG in the first few rounds and therefore may need all 15/17 to get it done.
Yet even with modern HP bullets, the 9mm's "stopping power" (or, if you prefer, BG-putdown ability) is still iffy.
See:
http://glocktalk.com/showthread.php?threadid=63621
But if even we assume for the sake of philosophical discussion that we're all limited to
10rd mags for ALL calibers, a full-size 9mm doesn't make a whole lot of sense for civilian CCW when more concealable pistols are presently available in more effective defensive calibers, in particular the 45acp, the 10mm & the .40. Hence, we've seen the demand since the early 90s for compact, relatively big-bore pistols.
However, I agree that having a gun you can shoot well is certainly better than not having one at all, and if the 9mm were all someone could confidently handle with reasonably accuracy, then I don't have a problem with that. OTOH, as Tamara can attest, with practice even thin-wristed females can confidently handle the "stouter" calibers, like the 10mm Auto. (So I'm sure some of the He-Men on this board would even survive a trip to the range with one.
)
Personally I don't see all that much of a gain over a 10rd 9mm by switching to a 10rd .40 S&W. And a 10rd .357 Sig is more of an expensive "lateral move," given the availability of 9mm+P ammo (the difference btw them being 150-200 fps depending on who's comparing what loads).
Bottom line: if you're going to move up the caliber food-chain in any meaningful way from a 10rd 9mm, then it's either to a 10rd .45 or a 10rd 10mm, the latter being the more versatile choice across a wider range of
possible BG-shooting scenarios if you feel such scenarios may be looming in your CCW-future. Versatility aside, a 10rd .45 is just fine too.