I would have been quite taken by a 3" 329PD. I picked up a regular 329 today and the Backpacker was REALLY tempting me because of its shorter bbl. Chose the 329 instead because it was such a featherweight.
I will warn you though... I'm not recoil averse, having shot over 1K hot ..44 mag loads from my Taurus M44s (one of which was the DAO non-ported snubby). But I took the 329PD out this afternoon and it was a real eye-opener. Have never shot anything like it. Closest thing to getting my attention in a similar manner was when my buddy and me each took his double bbl 12 gauge coach gun, loaded a pair of 3" magnum buckshot, and pulled both triggers at the same time. Shooting the 329PD was that kind of "fun". Maybe worse. I'm going to get some X-frame rubber grips for it... as those are supposed to fit and tame the harshness a hair. I thought that the web between my thumb and forefinger was bleeding after three shots. And I was wearing gloves!!!