Just gave a quick skim of a few pages, but feel a need to add my own contributions.
- One of my favorites. Beretta 92FS (pretty much covers all the Beretta, 96 isn't much different to look at on the scale we'd see in game. the 92FS is the one customized and used a lot in the Resident Evil games)
- Fabrique National Five Seven (this one already all tricked out with a laser sight and extended magazines)

and another view
- HK USP .45 w/match compensator

and barring their mis-spelling of standard, this is a good reference picture for variations
There's also the Arachnos handgun that appears on the weapon rack base items.
..and for all the dual pistol specific options, by all means just slap an extended clip on them to justify how much ammo they pour through.
Though, I have been working on a "low ammo" dual pistol blaster, that carries revolvers. Skips the nicer powers in the set, true, but still managing to hold their own in missions, playing to the soft control aspects like using the standard ammo to get knockdowns, or swapping to the non-standard for holds with suppressive fire, all buying precious seconds to take down that next enemy.