Hey Willie, the 585 in dingus's link is mine, as it says I just got it back from being overhauled, 585's are plauged with leaking electolite caps, I have been quite impressed with the amp so far, I am running a GAS Thoebe for a preamp, a tube buffer, and a small amout of assistance from a DBX unit, into a pair of Legacy Classics. Currently I am running into 4 ohms, I have other plans, but running it pretty hard for over an hour and the fan I installed did not kick on, I have it set pretty low too.
I have a friend who is running a pair of 555's into a pair of hungry Infinity's, he is still running his old tube preamp, I forget the model I believe it is a Conrad Johnson or possibly Harmon Kardon

, he is putting them into a 4 ohm load, again I forget how many watts this ends up being but it ends up being an incredible amount of power and they do it as a walk in the park.
Jim