Reading the recent replies in the thread, it worries me that the importance of a quality phono stage is not taken seriously enough? Its the first step along the amplification chain, and the most critical dealing with a minutely delicate signal. Get it wrong here and its down hill all the way, cant put back what has been lost, the word 'compromise' can be applied latter, but at this point, compromise is not an option IMHO? It goes back to the beginning of hifi as we know it . . . 'rubbish in, rubbish out'. Going to a lot of trouble to get the information off the record in the best way we can afford, then mess it up at the first hurdle?
Using a quality mm cartridge, why worry what happens in the future unless you have enough in the budget (most of us dont) to plan ahead? Graham Slee does, I believe, do a nice MM/MC phono stage with selectable mc cartridge loading options, but it costs.
I started my second hifi life with mm and was very happy with the Croft mm phono stage, 2 years on I moved to mc. The answer, a mc transformer that plays into the standard MM phono stage. However, not any old transformer, I looked and waited for a used veritable loading transformer to come on eBay, cost me £200, (worth noting, mc cartridges vary in the loading they work best at). I compared with more expensive 'fixed loading transformers and mc phono stages' there is no comparison.
Since then, my beloved mc transformer simply gets transferred from phono stage to phono stage, one only has to buy cheaper mm phono stages, that is forward planning. As and when and if, I change my mc cartridge, I simply change the loading to suit the new cartridge. Forward planning is good but do it right, going at it half cocked could be even more expensive IMHO . . . ?
CJSF