Cartridges are like ski boots. Once you use em you own em. Unless it is a demo unit it will not be returnable. Whether or not it sounds better in a few hours depends. I have a Clearaudio cartridge that out of the box was very bright. I had to program a special curve for it. But it tracked wonderfully and had great separation. Eventually it started sounding dull. I set the curve back to flat, perfect. I can't tell you how many hours it took. I would say a month of steady listening.
Most important is set up. Unless you are using a test record it is unlikely that you are getting it optimal. I recommend the HiFi News Test record. Get your anti skate set right and your resonance frequency down around 8-10 Hz and I promise it will sound better.
You got a great deal so it is unlikely that you will find a $2500.00 cartridge that is better. I do not know of any bad $4500 cartridges although you will never see me buying a Decca.
Most important is set up. Unless you are using a test record it is unlikely that you are getting it optimal. I recommend the HiFi News Test record. Get your anti skate set right and your resonance frequency down around 8-10 Hz and I promise it will sound better.
You got a great deal so it is unlikely that you will find a $2500.00 cartridge that is better. I do not know of any bad $4500 cartridges although you will never see me buying a Decca.