I wish this didn't change almost daily!
I don't currently wish to change any of my gear which is unusual for me. I do think that some gear will be with me for life though, especially my TTS8000/SME IV and Art 1, my Technics SH-X1000 DAC and my NS1000M. Picking one amp only would be an issue though; on different days I put one on and love it then I will swap again and love again. They are the Nakamichi CA7/PA7 and the Lentek integrated. I really love them both sonically and aesthetically.