i am wery happy w/the o-l modded rb250 on my oracle; also pleased w/the o-l dc motor mod which i installed. i see no reason why a spendy cartridge won't work yust fine on the o-l mod arm, as it is supposed to be superior to both the stock *and* o-l-modded rb900. i currently have mounted a lo-output ortofon mc25-fl, but have a lyra clavis, rebuilt by vandenhul for symphonic-line, that i've been meaning to install. truth be known, the ortofon sounds so nice that i'm in no rush to remove it. i also wanted to get used to the o-l mods before i go ahead & change out the cartridge.