The gurus here on the forum loves the tangential decks, the audiophiles also loves MMC2 or SMMC2, I am a mecanic, working with big printing m/c,s every day since 40 years, radial tracking I can see understand and work with, and its simple, Tangential is part mecanics and part electronic, electronics depend on power supplies,in Mexico city my power supply from the city is going up and down some 20%, I have nobreaks installed for all my Beo equipment. Considering this I will never install an MMC 2 and I will stay with radial tracking.
An (S)MMC2 is one of the best cartridges you can buy today, but to support this high quality all the rest of your equipment will have to be the same high quality, connections, preamp, amp and speakers, not to forget, vinyl.
I have some 600 singles, and some 70 LPs, all exept some few worn or with scraches, an MMC2 will be overkill for these.
And Remember KIS (Keep It Simple), But do not give up on your BG 1800, as Martin says, keep them alive.
Søren
Beosound 3000, BL 4000, BL 8000, BG 2404,BG 5000, BG CD50, Beocord 5000, BM 901, BM 2400, BM 4000, BV S45, BV 3702. There is nothing we cannot do, but a lot of things we don't want to do!!