Class A amplifier choice, need suggestions

My favorite is the Pass X600 monoblock. It operates in class A up to 100 watts continuous (200 watts peak), then shifts into class AB mode. While it doesn't go up to the X1000's 1000 watt max, its 600 watts of rated continuous power is more than enough for most applications, and it doesn't have the X1000's power connection idiosyncracies. It sounds terrific in the midrange, pretty good in the high end, and OK if not super in the bass.

Pass' Peter Perkins informed me last spring that he underwstands that the X600 operates in class A up to 100 watts continuous and 200 watts peak. This seems to corroborate the 150 watt (effective average?) Muralman1 cites. An interesting side note was that he described the X1000 as generating 90 watts continuous and 180 watts peak in class A. Obviously, the X1000 goes higher than the X600 in class AB. I conjecture that the X1000 may generate more heat per class A watt and that the heat dissipation capabilities of the chassis and heat sinks (same for both amps) are a limiting factor in setting the class A bias.