This is the 5" barrel 10mm with the Sig style decocker? I would get it. I am in the minority that likes Smith 10s. It was one of their guns of the month back in the early 90s. Magazines are still available. I have a 1076 that treats me right, and is a joy to shoot.
The biggest downfall to it IMO is the decocker. Gotta treat it with care, not to mash it down.
The Glock on the other hand, real good pistol. Should be able to take full power loads without any problems, parts are available, and from what people here say they like it.
Why not buy both?