I'm married, so I can enjoy this conversation without the testosterone contest of "why don't you have a girlfriend like I
finally do!"
Han Solo is one of those guys who would have an $800 primer grey El Camino, with a Supercharger under the hood. For that reason, I don't think he'd use an old blaster. Check the evidence in both ESB and ROTJ. Han's pistol always had the latest upgrades on it. If he just stuck with 'old reliable', it wouldn't have changed each movie. For that reason, I vote Han a USP kinda guy. .45 of course. I could also see him with a Glock 10mm, since Glock is so aftermarket friendly. No matter what he chose though, it couldn't be a revolver. You can't spray ammo like Han does and expect to reload after every 6 rounds.
I agree that Chewy would have a good Combat shotgun with a bandoleer of shells across his chest.
None of the Jedi would have firearms, it just ain't civilized. They would have a mix based on their personal tastes, similar to what you find on Highlander. Darth Vader would be a Barbarian sword man, while Obi-wan would have the samauri sword.
If Jango Fett had a pair of CZ's, one of 'em would be an 85 Combat, for the left handed controls.
When li'l Boba grows up, he'll be toting a supressed MAC with one of those fancy Shoulder rigs.
I think you guys are also right on the money with the Tusken Raiders. Old military bolt guns with cheap Chinese optics would closest resemble the performance of what they had...
Stormtroopers, being so well funded and having the latest technology, would be armed with OICW's