I have two Old Stone Oven stones, which I've been using for years, and I consider them quality stones.
As someone who never used an IR thermometer until early this year, I think you should get an IR thermometer. My thermometer has told me so much that I could never have known before. For example, the oven that was here when I moved in, in January, wouldn't heat the stone any hotter than 520 when set at the max temperature (500, calibrated +30 or +35). My new oven, set at 550 (+35) can get the stone up to 625 if it's on the bottom rack, or at least 750 if I set it on the oven floor. Also, I bake pizza on/in the grill somewhat regularly, which can be very difficult to do right even when you know the stone temp.
After "inheriting" my thermometer, I found very quickly that it's good to know the temperature of your stone. Plus the laser makes a great cat toy.