I'm a .357 addict. All the way from J frames to N frames. Skeeter seemed to believe the S&W 5" Model 27 the best 'all around' .357 made. Of course I have mine and enjoy it. I also have K frames and my L frame. I carried an L frame (early model 686 no dash) as a duty gun and put 10K through it in less than a year practicing.
When it comes to S&W .357's, one would be hard pressed to beat the 4" L frame. I'd miss my other .357's but if I had to part with them and keep just one? Which, is something I hope to never have to do. I would most likely wind up keeping the 686. The cylinder length is great as it allows you to seat a #358429 in the crimp groove (as you have discovered). The added muzzle weight is just enough to help keep me on target for quick follow up shots if needed.
Good luck in your search!
Murphy