Don't be misled by words like "Pro" or "Tactical". With that said, they do denot something in terms of features, but pay more attention to what those features are beyond how they are marketed.
Example: many companies claim the barrels in their pistols are "match" barrels or "match quality." That's a very subjective term, kind of like saying a TV dinner is "gourmet." There are no standards for "match" and anyone can put that on their product regardless of quality. That said, there are some VERY good pistols with "match" stamped on them (think Dan Wesson 1911s, some of the finest available at the non-custom level). Also, remember that "custom" is an often used term to market products. Now, some terms such as "national match" on a 1911 barrel bushing do mean something, but again one component does not make for an effective pistol. Analogy: I can slap a great pair of rims and a killer exhaust system on a 1985 Ford Escort, but in the end it's still a 1985 Ford Escort.
A full size pistol is generally going to provide greater control and allow you to shoot more accurately than a compact pistol due to many factors (all other things being equal). I recommend you first figure out what action type you want (i.e., striker fired w/o a manual safety, DA/SA with a decocker, DA/SA with a safety, single action with a safety, etc.). Then, start narrowing down from there.
Most of the name brand service grade pistols will do the job as equally well as one another from a pure mechanical function standpoint. The main difference being how the pistol works for the individual shooter.
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