[1st1911Pistol]

[...] I'm kinda leaning to Springfield XDM, Walter PPQM2, H&K VP9, Sig P320, S&W MP2.0. I'm like to go try and shoot these 5. [...]

Kudos for planning to test fire all of the pistols on your short list.

Off your short list, I would personally gravitate toward the H&K VP9 with a Gray action job.

Link: https://grayguns.com/gunsmith-services/heckler-koch/vp9-action-cleanup-perfection/

Edit: on purchase through 9/30/17, H&K is offering four additional mags for free with a VP9 purchase.

Link: http://hk-usa.com/freemagazines/