The Jelco Tonearm is a derivation of the Jelco 250S. It is capable of extracting lots of details and place each instrument in an orchestra. Very good allrounder and easy to use as all Jelco tonearms. For me it is a bit on the light side when it comes to bass performance. Pair it with vartidges thar have some flesh on the bone.
A Jelco 850 will be a good improvement. A SME M2-9R sounds more fluid and warm. A SME 309 will work if its sound is to your taste. A Jelco 350 has abit more substance.
I tried all of them an now have a SME M2-9R mounted.
if you stay with the original tonearm, try Benz, Van den Hul, Goldring Ethos. I would avoid Lyra, even so that I like them. AT i did not try on the Luxman but I would avoid.
it also depends on the Phonostage you are using and obviously the Loudspeakers.