If you want a good airgun, you have to spend money. Your "S&W lookalike", was a crosman, and it's not a bad gun considering it retailed for about 40 bucks, and still does, on sale.
If you want a good revolver "lookalike" though, you have to get one of S&W's actual airpistols. They run about $300 in Canada, and are identical in weight, weight distribution, dimensions, and trigger pull as S&W's powderburners.
I have one with a six inch barrel, and use it alot, as it's good practice that crosses over for when I shoot my .357 six inch. It's not identical to mine though, because I have a dan wesson revolver, not a smith. I clamped it into a vise though, and got groups about 1/4" at 9 meters, which is good enough for me.
If you shoot olympic style, you can get a twinmaster trainer, which is identical to twinmasters free pistols, and will run you $600 or more. I believe Twinmaster also makes a pistol with a grip similar to the 1911 as well, but I'd have to check again to be sure.
I've also heard that guys who shoot the 1911 in Bullseye, like the Weihrauch HW40, apparently it doesn't look at all like a 1911, but has a very very similar grip angle, trigger, and sight picture, and is also very accurate, but affordable, only about $200 or so.
Anyway, you get the picture. Not all powderburners have an airgun equivalent, but you will have to spend the money if you want the quality, there's no getting around that. A number of the "replica's" just look the same, and are for kids. Most guns that sell for 100 bucks fall into this category. If you want individual reviews, you might want to try the, "canadian airgun forum", as it has a larger following in airguns than CGN for now.