One word BULLSEYE! It's still doing what it was doing 100 years ago, shooting tight groups! People complain about it being "dirty", but you dont get unburned powder in the upper pressure levels, just some soot. I use it because i cant beat the accuracy and I can shoot more for less $$.
I have also shot Vihtavouri N320 and N340 in the 45ACP. Both are excellent. It's going to be your cleanest powder most likely, but it's pricey. And man i have worked up some tack driving loads with it. Seeing as these are for hunting use, it really woudln't hurt your wallet but so bad. You could get some decent velocity with N340. More so than with the super fast burning powders.
Between your powders, Unique would be my pick. You wont get near the velocity with the fast burning powders like WST, Bullseye, titegroup as you will with powerpistol and N340. Powerpistol will be quite flashy as well. N340 will not (single base).
And come one, it's a 45auto. Recoil really wont matter trying to make that one well placed shot.