For outright accuracy, lovely trigger, very forgiving in use, assured build and lovely looks, consider the Weihrauch HW40. It's so, so easy to extract near match levels of accuracy from this lovely pistol, at not silly money. And it has firearms looks, although not a replica.

If you value the resemblance to full bore pistols more, I'm no expert on the Umarex pistols, and there are lots of other peeps on here with the knowledge.

However, I love the looks of the Colt pistols, especially the gunmetal grey one (can't remember the proper title now!)

And, I can really see myself falling for a James Bond-esque PPK one day. Nice and cheap, too. But it only shoots bbs from its smoothbore barrel, so will not be as accurate. Good fun, though!