Don't know about value, and I've never even seen a 4", but I have shot 6" .44s in the Super Blackhawk, the Smith & Wesson N frame, the Dan Wesson, and the Anaconda. I have shot the N frame in .45. Of all of 'em, the Anconda handled and shot the best, both in accuracy and terms of punishment to the shooter. The 6" Dan Wesson was second best. Of the N frames, the .45 was, by far, the best & easiest to shoot. The Blackawk and the .44 N frame don't even rate a mention in my estimation. They just ain't right.
I got out of large bore revolvers a while back, and this assessment is somewhat dated. If I was to re-enter the fray, I would most likely seek a good .45, like the Anconda.
Ahhh... what do I know about it anyway?
ps. The .41 magnum is the one that shoot really well in everything.
Jes' sayin'.....