It will depend on what you will be connecting it to??

If your amplifier has a phono input then you won't need a stand alone RIAA as you already have one in the amp.

If you are connecting to one of the more modern B&O systems then you will need a stand alone pre-amp.

I use one from link as they do models with slightly higher output which is handy for compensating for the low output from B&O MMC cartridges.

You could buy one from   Their kit is cheaper but you will have to wind the volume up on your amp to achieve suitable sound level from the system. This, in tests of several of the low cost sytems, led to unacceptable levels of hum, for my taste.

I use the one from phonopreamps.com that has a DIN input and variable gain for a Beogram 3000 with an MMC2. Very happy with it, I think it was a 570 model, the ability to gain match with the other sources makes the table so much more useful. Sonically can't find anyting to complain about, in fact I've never heard my Beogram sound this good before.

The company also supports all countries voltages, they send a power supply with the right power plug for the country too! Very happy with their products and service.

As Graham I'm using one from Phonopreamps, but there is one