Fishing, if you decide to go with MF and you buy new, dont get sucked into paying full list price. You should be able to negotiate a discounted sales price on MF M6 components. Id say at least 15% off and possibly more.
Second, whether you buy new or used, make sure you know exactly who will handle repair service if you ever need repair service.
Third, if you are considering buying new, before you do take the plunge, make sure to confirm what the warranty period now is and who stands behind it. When I bought my components 2 years ago, there was 4 years of extended warranty from Tempo (who was MF's US distributor at the time). This presumably gave me a total 5 year warranty. However, Tempo is no longer the US distributor, and unless I missed it, I dont see anything on MFs website that indicates what the current warranty terms are.
In my case, it has just dawned on me that I had better find out if MF is or is not standing behind the warranty extensions that Tempo was giving out. I assume that MF is standing behind the 5 year warranty that I received even though Tempo now seems to be out of the picture, but if I find out that I am no longer covered by warranty, I am not going to be a happy camper.