Dynavector Karat 17D3: retip for $500 or get something new?

I have a Dynavector Karat 17D3 cartridge which I liked soundwise until it began to mistrack severely. Had it examined and it turned out the diamond is almost completely worn out.

I can get it retipped with the new Micro Ridge Stylus for $500. Alternatively, I can attempt to sell it, add $500-$600 and get another cartridge. The question is: can anything it the range of $700-800  sound better than a retipped "old" Karat? 

My system consists of Mitsubishi LT-30 turntable, Nakamichi CA-7A preamp, SONY TA-N330 ES power amp and Solstice MLTL speakers. Speakers are not very bass-efficient so the new cartridge shouldn't be bright.