Wondering which of the following two Audio Valve amplifiers to buy:
Any helpful comments would be appreciated.
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(1) PRIMALUNA PROLOGUE 2
(2) Pathos Classic One

I agree with Jim - why these two? What brought you to select these?
Power, looks, reviews, reputation.......

You're talking serious money. Do you want new or would good used be
better value? Do you have any engineering skills at all - could you do
a simple modification or is it just changing valves and cables?

If you want any useful opinions you'll have to tell us what speakers
you use, what music, and what size room just for starters.