I use the Center of Mass In-Car Safe, having one in each of our vehicles. As mentioned, they won't stop a determined thief, but then that theif has to know to bring cable cutters. Or have a Gerber/Leatherman type tool strong enough to cut the cables - I had to do this when one of the locks malfunctioned and I had to send it in for the Warranty. It took me about five minutes to cut the cable.
I own two versions of the gunvault, the smallest one and the next level up (the electronic finger pad.) I don't think either would stop someone who seriously wanted to break into my vehicle to steal whatever might be in either.
But the greatest number of vehicle break ins are smash and grab - what can't be carted off quickly will be left behind. In those cases either gunvault will do the job.
I would bolt it down in your truck the wire cables are easily cut. As for a brand to get that is up to you.