Harold and Susan Vordos wrote:
....
Unfortunately, I'm one of those guys that thinks if a little power is good,
more is better. I currently run a McIntosh 2300, rated at 300
watts/channel, and will meet specs pulling over 400. I, on occasion,
drive it that hard. ...

Jimminy Crickets!! (as my mother would say)

thinking I may go to a 600 watt/channel model. ...
Considering the additional information I've provided, would you still
recommend using the #14 wire? ...

Never mind what I said before, I definitely think that you would not be
happy with anything less than #10 wire. (How's that for not answering
the question?)

Bob