I special ordered a pair of 432-UCs (one in black and one in silver) a month or two ago. The silver one had a clocked barrel and I refused to accept it. In my experience, Smith will not fix a clocked barrel. They will tell you they will fix it. Then, two months later they will send it back to you with the exact-same-crooked front sight.

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While waiting on the guns I discovered that a fella can't find a single .32 H&R Mag factory found within 40 miles of our home. So, I ordered the parts to reload them on my XL750, some Starline brass, and some 85g XTPs.
While waiting for a replacement on the silver pistol, I found the black one has ~20% light strikes with my reloads (CCI #550). Gotta say though, it's a sweet shooter when it goes bang. Much tighter groups than I get with .38 in steel or Scanium J frames. Easier to do it too. The trigger isn't as smooth or light as a 640 Pro, but it's much smoother/lighter than, say...an M&P 340. Also, the 432 has much better sights than the 640 Pro. Properly regulated too.
The replacement silver 432 looks good, but I haven't shot it yet. I worked up another batch of reloads with CCI #500s and we will see if that makes any difference on the black pistol's light-strikes. Hopefully, the silver one will work as it should. If so, I'll order an extended firing pin for the black.
In any case, as others have advised, I would only pick up a 432-UC if you can inspect it in person. The stories going around on the Interwebs are justified.