I've used Jolida, Primaluna and now Eastern Electric. If you can find one of the pre-circuit board Jolidas, grab it. I owned a sj-502A that was absolutely sweet and pretty powerful. Tried the Jolida 1000a - didn't like it AT ALL. It was very dry, distant sounding. Used the PrimaLuna Prologue One until recently, and in it's class, it is much more refined than the Jolida offerings and very powerful in spite of low wpc. It drove a set of Vandersteen 2ce sigs with room to spare. The Eastern Electric M520 is the best of the lot; greater detail than the PrimaLuna and deeper, more refined bass; worlds better than Jolida. Of course it is also more expensive. I did however work a deal based on a Agon auction and got a new M520 for basically the price of a PrimaLuna.
