Rockyboy,
If the alternatives you named (GeoDisc or a professional) are in fact the only two you'll consider, I'd recommend the latter.
If you're open to other suggestions, please let us know which tonearm and turntable you'll be using. That's at least as important as knowing the cartridge, especially when it comes to alignment tools.
BTW, why not list your sytem? You'll get more meaningful responses.
If the alternatives you named (GeoDisc or a professional) are in fact the only two you'll consider, I'd recommend the latter.
If you're open to other suggestions, please let us know which tonearm and turntable you'll be using. That's at least as important as knowing the cartridge, especially when it comes to alignment tools.
BTW, why not list your sytem? You'll get more meaningful responses.