I have a SME 309 tonearm that I have enjoyed for over 10 years. The SME tonearms prefer welterweight cartridges, i.e., about 8.0 grams. My current set up is with a bantamweight Monster Cable Alpha Genesis 1000 and it is not a good match as I cannot dial in the recommended 2.0 gram tracking force. The weight of the Monster AG is listed as 4.2 grams in the owner's manual.
However, I like the sound of the venerable Monster so it is a compromise I can live with. I am reluctant to replace it because most of the cartridges I have heard over the last five years are very "zippy". Granted, the Monster AG has been around for about 15 years and is no longer in production, it still sounds good to me.
The following are more general and are not specific to SME tonearms.
As for recommendations, almost any cartridge is synergistic with the SME. If you like the sound of MM, and you like the Shure sound, get the V15. I have never heard the V15 , but a colleague of mine thinks that cartridge is zippy. He thought the Grado carts are zippy too. He preferred the Fulton cartridge, but that has been out of production for about 20 years.
Depending on the amount of money you have to spend, you might want to look at the Audio-Technica 440 ML ($100), Shure M97E ($100) Denon DL 103 ($200) or the Stanton 881S ( a favorite of Doug Sax back in 1980).
For some more info try these two sites: Salvatore (
http://www.high-endaudio.com/RC-Cartridges.html#ClC) or Moving Coil (
http://www.moving-coil-cartridges.com/index.htm).
A good article to read regarding cartridges in general is in Stereophile 1987, 10 (5), pp. 109-128. The article is 15 years old, but it gives a description of what to look for in a cartridge.
BTW, the "King of Bass" reproduction for cartridges in my opinion is the SME V. It is extremely pricey at around $3200.00, but to my ears, it is the best thing out there. I probably won't buy one unless I am able to grow a money tree.