It's no where near the amount you have budgeted, but the Denon DL-103R from Audio Cubes in Japan runs $259 shipped and is a great sounding cartridge on a Rega. I've also had very positive sounds out of a Rega Exact which is made for your TT. At $599 it's pricey but can be found used for less. I have used them both and like them both quite a lot.
Paul Green
Paul Green