I worked sales at an audio store in the mid-'70s and we carried the Marantz 6300 as one of our main demo turntables. The 6350q looks to be a slightly later, improved version. We used a Fidelity Research MC cart on that 'table, but I also recall that the high level Grados of that era (e.g., Z2+ or whatever) sounded particularly good on it. The modern equivalent would be a Grado Prestige Silver or Gold. Since that's out of your budget, then it would be the Grado Prestige Blue, which is a notch above the Green, both in terms of cartridge and stylus.
You should also get good results with the Ortofon's latest iteration of moving magnet cartridges--the 2M Red. It also has a high compliance to match the arms of the '70s and '80s, and by most accounts is a significant improvement over the OM series.
You should also get good results with the Ortofon's latest iteration of moving magnet cartridges--the 2M Red. It also has a high compliance to match the arms of the '70s and '80s, and by most accounts is a significant improvement over the OM series.