I'd be interested in what amp and speakers you're running, too. But based on what you listed, I'd start with upgrading the TT. The carts are decent enough. There's a point of diminishing returns when you put a high-quality cart on a so-so deck. Spend on a quality TT now that future higher-quality carts will benefit from.
Actually, with $1,500 I'd be apt to just get a fully serviced Technics SL-1200 MK2, and you would still have plenty leftover to stick a killer cart on it...like a Nagaoka MP-200, Hana EH or Benz Micro Silver. Then you're done with it...for now :)
Actually, with $1,500 I'd be apt to just get a fully serviced Technics SL-1200 MK2, and you would still have plenty leftover to stick a killer cart on it...like a Nagaoka MP-200, Hana EH or Benz Micro Silver. Then you're done with it...for now :)