FWIW I’ve been in this game a while and this is the first time I heard of Leitz. I know that’s a German brand associated with quality optics. Scott’s testimonial aside, the fact a table saw mfg’er includes them actually doesn’t mean much, as most blades that some with machines are cheap.
So I won’t dispute they are good blades, but $87.25 per blade, some of which you’re not sure you’re going to use much seems to me not a good expenditure.
You’ve gotten rec’s from some experienced people, one of which is CMT is overall a better blade than Freud. This is your first cabinet saw, truthfully any decent blade is going to get the job done. You haven’t mentioned the motor size. If it is 1.75 or less I recommend you go with thin kerf blades.
As you process more and more wood, and the type of wood you deal with, you’re going to find regardless of brand, sharpness is the major factor in cut quality. Edge retention is the determining factor that separates many blades, and how often they are off to the sharpener.
Re my comment about Freud, they aren’t that horrible, in fact two of the better blades I have are a glue line rip and a melamine blade - when sharp. Unfortunately it doesn’t take long before you can see the cut quality decreasing. I find this is typical with any Freud blade.