Good moving magnet or cheap moving coil


I want to buy a new cartridge to replace the Sumiko BPS in my LP12.Although the BPS is a moving coil it never had any magic in my system.Rather thin sounding with woolly base.
Should I go with a good moving magnet (such as the clearaudio aurum beta) or another high output moving coil(which one?). Budget is about $600 tops.
rrm
A good moving magnet is the Shure V15VxMR. Excellent tracking ability as well.
I'd also recommend a good MM: both the Clearaudio you mention and the V15-VxMR are good choices. So is the Reson Reca or the Goldring 1042.
I have a Garrott k2 mc from needledoctor.com excellent cart for the money! Was surprised how much better it sounded instantly. Price is definately affordable! 300 or so.
What kind of arm is on the Linn? If it is an Ekos or Ittok, you can use a Denon DL103 MC cart(low output) that will blow the BPS out of the water. If you have some other arm, then the Dynavector 10x4 MkII is a very good high output MC that will work with most arms, and should sound alot better than the BPS also.