Help I need a new cartridge and stylus

I have my late brother's turntable and I needed a new cartridge and needle for it. The one he had was an ortofon concorde 20.
The turntable is a Technics SL-1301 and the concorde sounded great when I tested it but it only worked out of one speaker (one set of wires in the cartridge were broken). I have Klipsch KLF 20 speakers and I like all types of music from classical to jazz to rock. I like a clear full sounding range and some bass but not this boom boom stuff.
I called around and everyone had something different to say about what to get, which was very confusing ; "Concorde is only for DJs", "Stanton is junk", etc.
A repair shop sold me a new head shell with a Stanton cartridge and Ortofon Super OM 20 stylus. I am not so impressed by the sound. It sounds a bit tinny and not so clear. Is this quality stuff I got? Also, could the old cartridge have been repaired?
I do not know a lot about audio equipmenet and you may be laughing at this equipment, but I do like good sounding music and the turntable means something more because my bro and I had a love of music in common and I want to use it in his memory. Any help/advice would be much appreciated.