TSM-M (soon to have MM upgrade) user w/ original Stratos monos (upgrade caps) and Tempest pre. I like the setup fine, though sometimes I wished I gone and listened something like Harbeth, ProAc or the old school Spendors, for something a little warmer and more 'euphonic'.
Sort of not fair for me to comment though, as I have the rig in a sonically lousy room. When I heard the Sasson LTD speaker here, it sounded just "ok", but when I heard it at Marbles place, I thought it was one of the best speakers I'd ever come across....(and my upstream components are not quite what he has, but not too far behind)
I'm not using the Zobels. I couldn't tell any difference, so it was just something less in the circuit.
Merlins are no doubt fine speakers, and its amazing what Bobby can do w/ the fairly humble Morel drivers in the TSM. I would suggest trying to find used, and then you could always get back your money as they are in demand.
BTW: Bobby told me that if I like the TSM-M, I will 'soil my pants' when I hear them w/ the MM upgrade.