First of all there is nothing wrong with Technics stock headshell on SL1200GR turntable and this headshell is the best match for this mid mass arm, you can change it if you like different design or if you need higher mass, but do not expect any upgrade with the most of them, especially conventional like Jelco.
One of the cheapest and the best headshells available today (new) is Audio-Technica Technihard with adjustable overhang, azimuth. This shell has treated holes for cartridge mounting from beneath. And two models available (long and short). Read more about Technihard material.
There is a magnesium shell from AT, but it must be avoided for Technics arm as with the treated mounting holes there is no overhang adjustment on this model and stylus overhand can be off with some cartridges.
Many great headshells are old, available secondhand. This is the one i really like, it's AudioCraft headshell with treated holes on the finger lift (very easy to use). Grace headshell is nice. Stax headshell is nice, it has azimuth and overhang adjustment. This one is not cheap, but it's a perfect lock headshell (dual lock). On the cheap side something very simple like Kenwood is nice for Technics tonearm. Entre headshell is also nice and cheap.
On exotic side there is a Grace Carbon headshell which is very nice, but expensive.
One of the cheapest and the best headshells available today (new) is Audio-Technica Technihard with adjustable overhang, azimuth. This shell has treated holes for cartridge mounting from beneath. And two models available (long and short). Read more about Technihard material.
There is a magnesium shell from AT, but it must be avoided for Technics arm as with the treated mounting holes there is no overhang adjustment on this model and stylus overhand can be off with some cartridges.
Many great headshells are old, available secondhand. This is the one i really like, it's AudioCraft headshell with treated holes on the finger lift (very easy to use). Grace headshell is nice. Stax headshell is nice, it has azimuth and overhang adjustment. This one is not cheap, but it's a perfect lock headshell (dual lock). On the cheap side something very simple like Kenwood is nice for Technics tonearm. Entre headshell is also nice and cheap.
On exotic side there is a Grace Carbon headshell which is very nice, but expensive.