Harbeth with Croft phono integrated vs Yamaha AS1100/AS2100

I confess from the get go... I now own the Croft Phono Integrated, but have been playing with the idea of feeding it more power with something like the Yamaha. It’s the P3’s, so we are talking inefficient, even as far as Harbeths go. I have to say, the Croft with my Amperex 12AX7’s is really quite good. I have no issue leaving the Croft/Harbeth pairing alone...It does so many things well. While it may give up some detail, it gives a nice tube sound that immerses me in the music. I’d have no trouble endorsing the combination...just thinking about the Yamaha lately. Any thoughts ??? (-: