ain't life a bitch, havin' more than one obsession? ;~) i yust recently installed the full-stebro exhaust w/euro down pipe, & an sz hedder - *really* opens tings up... :>)
re: cartridges, believe it or not, the ortofon mc25-fl, at retail $450, but always on sale at $225, is a great cartridge. only 0.35mv output (a mfr - was it wavelength audio? - i forget, sez it's really only 0.2mv), but if yer fono-stage has the gain, i tink it's really nice for the money. i've also heard good tings (but no 1st-hand experience) about the audoi-technica oc-9 (?!?), retails for $400, usually awailable for <$200. i was gonna try a dynavector karat d17, but i sheared off the canteliver the wery 1st time i went to mount it - my cartridge horror story. ;~) at least i got it used, cheap. of course, if yure gonna ackshully *spend* $500-$700, wait 'til the right used cartridge comes along. i got my re-tipped lyra clavis from klaus @ odyssey audio, for $490...
good luck, doug s.