[Elecraft] K3 power out - key down

[Steve]

I am thinking about replacing my ORION II with a K3 as it is smaller 
(much smaller).
My OII will do RTTY (or JT65) at 100 Watts (with the fan option).
What will the K3 do? (I know it has fans, too)
I hear lots of comments about digital power out for the KX3 and heatsinks...
I guess the question also goes for the 500 Watt amp, what will it do key 
down?

btw, 0.5w JT65 is great fun with my KX3...  but I also like to contest 
at 100w.

73, Steve WB3LGC (hope to see you on the RTTY NAQP tomorrow)