Pubul57 - I really didn't compete the Phi 300.1 "versus" other contenders per se. I knew when I auditioned it that it was right for my ears in my system, and have enjoyed it so much I haven't really felt the need to change from it, unless ordering a second one so I can mono them counts as changing.... I have had a VAC Ren Sig MKII for some time so I was pretty familiar and very happy with the "VAC sound" and working with Kevin is a delight, so this was just a logical step for me that I have been glad I made since the first moment...
FWIW my previous 2 amps were Dodd 120's and Moscode 401HR
Keeper for life? Who knows, but I really don't think about amps anymore..... :-)