Since you already have a J-frame Model 36, and a K-frame Model 10 in .38 S&W Special caliber, your next acquisition ought to be an N-frame in .38/.357 as well. I'd go with nicest Model 27 you can afford, unless you happen upon a Model 28 in like new condition. Both the 27 and 28 are true classics and you cannot go wrong with either one.