I used to have the B&O Beogram 3000, which used the same type of cartridge. (I used the MMC 3, btw). Here are my thoughts on the matter:
PRO:
B&O turntables are at the peak of the mid-fi turntables.
They are easy to use, tweak free, and produce a nice sound.
Also the cartridges they use, while a bit on the expensive side, are light enough and small enough, that they will not ruin your record collection, assuming you do a decent job of cleaning both your records and your stylus.
(I know this, because I used mine for about 10 years or so, then put away my table for CDs and did not get back to vinyl for another 15 years or so. The old vinyl still sounds great through my new table.)
CON:
B&O turntables are not really in the high end class, IMHO.
They do not image or soundstage well enough, and their frequency response is somewhat limited.
(I found out what a true turntable could do when I upgraded to a Basis 1400, with Rega RB300 arm and a Benz Micro Glider II cartridge.)
My opinion is that you need to make up your mind as to how much you want out of your turntable. If you are making CDs your primary source, and only want to play a few records now and then, it probably makes sense to pick up a MMC 2 (or MMC 3) cartridge. (I think the MMC 1 is way too expensive for what you are getting.)
If on the other hand, you want to really make the plunge into vinyl, then sell the B&O and get a used Rega P3, or a something similar. (A used VPI scout would probably be even better.) Of course this would mean spending twice what a MMC 2 cartridge would cost.
Good Luck!