Congratulations on your new shooter Paul. Hopefully you'll be able to get her broken in and vetted before too long. Will be looking forward to the range report (remember the pics)I pulled the trigger & bought the micro rapide @ cabelas. $849. + tax. Decent price considering what they are asking @ gunbroker.
As far as the worthiness of any sub compact for self defense purposes it comes down a given pistol's reliability. Smaller designs by all the manufacturers do seem to have squirrels in the proverbial tree more often than their larger kin? Normally they run fine out of the box or smoothen out with a little range time. I would certainly advocate being sure anything being considered for EDC is dependable. Beyond that it comes down to the operators adeptness at handling themselves and a firearm in a dire situation. The caliber argument is pretty much redundant at that point, it comes down to shot placement. Missing with a .22 or a .45 will do about the same thing when it comes to stopping a threat. It is arguable that a potential follow up shot is likely to be more accurate from a smaller caliber too?