Taurus: Don't bother. There are those who will swear by their Taurus guns, but they do have problems.
http://www.grantcunningham.com/blog_files/no_taurus_work.html
It may be cruddy...and require some factory time...or it may be just fine. If you're anything like me, it'll last for awhile before something breaks.
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It is very feasible to carry a S&W N-Frame revolver in 44 Magnum...or 45 ACP. I carry my 625 in the appendix or strong side position.
http://thehighroad.org/showthread.php?t=410847
Of the firearms listed, I prefer the S&W revolvers. However, the older guns are considered to be superior weapons to the current generation.
S&W does some decent work on guns. I'm satisfied with their trigger work, though aficionados think it could be better. It's better than a stock Glock trigger, so that's good enough.
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You should consider a gun with 3" barrel. It's easier to conceal because the overall size is smaller, yet it still has good performance.
I do like the 686...and it comes with either 6 or 7 shot capacity and your choice of either three or four inch barrels.
The Rugers seem alright. They're not very good looking, but seem to be good working guns. They offer it with either three or four inch barrels too.
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So what do I trust to carry? I have one Ruger SP101 and several S&W revolvers. All are fine for the task.