CAT JL-3 Versus VAC phi 300.1 monos?

Two world-class amps that can drive most any speaker beautifully - among the best you can buy when you need a lot of tube power (more than 60 watts).

The CAT will make the VAC seem like an air conditioner:)

OP, have you heard either?

Jwn's comments ring true. The CAT is great amp for all sorts of speakers, but it is the tube amp I would choose for speakers that generally need SS to sound their best, they have power current and can really control bass drivers for a tube amp and in absolute terms as well. I don't mean this as faint praise, it also sounds great with most anything you drive with it.