xd9x19
That really is a good setup in my opinion... I really believe you would be more happy with this gun into the future than you would be with the others you mentioned...
Make sure it is OK in your hunting area to use 209 primers and sabots...
To be honest there are some things that I would change on the basic gun...
1. If you start shooting the gun a lot then you may want to get a 25ACP ignition system - much cleaner than the 209's...
2. The plastic compsit stock MIGHT cause you a problem down the road but the problem is easily fixed with a bit of sand paper.
3. The new barrel MAY be really tight... PowerBelts will go down just fine but a bullet/sabot combination might be really tight. You will probably need to purchase MMP HPH-3p-EZ load sabots or Harvester crush rib sabots until you get the barrel broken in...
Good luck in what ever you choose... give a shout if I can be of any help...