Originally posted by Sandy Hancock I might consider the HD Pentax-FA 43/1.9 Limited, as its predecessor is the most difficult to love of the three.
And here is where you and I disagree; I find the 43 the easiest to love, and the 31 quite the opposite. I prefer the Sigma 30/1.4 for the kind of things I use a fast 30 for. Agree wholeheartedly the 31 is better in general, but for me, the Sigma 30 does what I need it to do better than the 31: Indoor portraits of family and friends.
My most-likely path forward will be to keep the 43 I have, sell the 31 outright, and maybe upgrade the 77 to the HD; but then again, my 77 is a beautiful, early silver MIJ, so I probably won't do that, either.