I also have a SL1800 Mk2 - it's stock, sporting an ADC XLM MkII at the moment. The ADC is nice, but I'm not fully sold that it's the ideal match. Stanton, what mods do you recommend? I can guess what cartridge you like...
Glad to have helped as I have two modded SL1800MKII's. What cartridge are you using with yours?
What is involved in rewiring a tone arm? Can you really hear the difference?