There’s another technique that’s the equivalent of 3DS MAX’s “smoothing groups”. Essentially what it does is average the surface normals of each edge, so that instead of a sharp angle you get a softer one. No chamfer, no more polys…
You select the edges you want to smooth (or the whole object) then go
Edit Polygons > Normals > Soften/Harden [options]
In the box that appears, set the value to 180 to soften everything at the max (recommended). A value of 0 leaves everything “hard”-edged. You can play with the values in between, since they may give you the look you’re after.