CAT JL-3 Versus VAC phi 300.1 monos?

IMHO, CAT stands above all in the amp dept, preamps are great but not the best...German press praised Cat amps 10 years in a row as best amp in the world!
These guys have MBl among other German brands in their back yard!

Choose your speakers first, then the amps. MBL and Avalon are very different from each other. No sense in putting the cart before the horse.

Soundwise, I don't agree with your suggestion that CAT stands above all in the amp dept. Nor do I agree that there is anything that is the "BEST". That statement ALONE is laughable and only individules with little experience fall for such.

I actually own MBL 101E's and also owned a pair of CAT JL3 Sig. MK2's.

I currently own MBL speakers and paired up with the VAC 450 Statement mono blocks and are by far my favorite.