The 103R is a very good cartridge and can be a truly fabulous cartridge and compete with the very best if rebodied (in say, aluminum or ebony) and retipped.
If you go that route and max out the performance of the 103R, the key to really realizing its full potential is a heavy arm, as in 25 grams of effective mass. So that means either a vintage arm (which is always a bit risky) or something like the Jelco 750D, and even the Jelco will need a bit of help with an additional 5 grams or so from a headshell weight or a heavier aftermarket headshell and the optional heavier Jelco counterweight to balance out the additional weight of the wood or aluminum body.
So, if you look at a new table, I would be looking at the 750D (or one of its longer variants if you have a table that can accomodate a longer arm) as just about the only new arm out there to bring out the best from that cartridge. The Schick arm is another possibility, but it is a 12" arm I believe and a lot more money. Fortunately, the Jelco is very reasonably priced and you can put it on just about any table.
