IF you are going striker fired, and a polymer gun then the gun to get is the Walther PPQ Match. I have the 320 XFive and, while there is an after market trigger kit available, out of the box the 320Xfive is not in the same league as the PPQ MAtch. It is heavier by design so recoil, such as it is from the 9MM is felt less in the heavier gun. That is it's only edge over the PPQ Match. IN my hands, at least, the PQ still performs better.
To the OP a better comparison might well be the PPQ Match SF when it lands here. It will cost a bit more than the Orange but is a steel gun, only striker fired. I believe it will take on the heavy S2, with a be crisp SA trigger and be capable if some impressive accuracy. In the right hands i might be the gun that takes on the S2 and Tanfoglio hold on IPSC Production. Time will tell.
Take Care
Bob