I have the three you mentioned as Still Alive correctly pointed out all three are reliable, well proven pistols. All three are not small guns. If I had small hands none of the three would be my first choice. For that there is the M&P Pro series. Assuming you have medium to large hands I would go with the 92FS or SIG 226 if it was my first pistol. DA/SA guns are inherently safer pistols to learn on and both will last most shooters a lifetime of shooting. Now if the OP has shot some and knows the is and outs of handgun shooting the SIG X Five is an excellent choice along with it's siblings in the 320 series. The US Army chose the 320 series for a very good reason it is an excellent pistol. It most certainly will garner a huge inventory of after market support over the next 35 years or more service with the US military. US civilians will garner to t like flys to dead meat.
That said for me the PPQ Match has several good points going for it that might interest the OP. IMHO the trigger is the best of the striker fired pistols. The grip, for me is excellent. Accuracy off the bench is scary. I never thought I would see a striker fired pistol shoot with a CZ off a bench and the PPQ MAtch does that and more even with my experienced eyes. The downside to the PPQ is whether or not warranty work and parts availability matches other pistols in the marketplace here in Canada.
The SIG X Five runs a close 2nd to the PPQ IMHO with a decent trigger and excellent accuracy. It is one of the flattest shooting pistols I own. By that I mean the design manages recoil extremely well. It is the tinker toy gun of the pistol world with it's modularity concept. If that is a plus for you and it was for me, then the X Five trumps all three choices the OP lists. The gun is dead nuts reliable, with a very good trigger out of the box, quality sights, and excellent accuracy with proven reliability, whats not to like. For a little less money the 320 lies in wait.
Take Care
Bob