I have a 275 IV that was my first venture into tubes 7 years ago and I have no intention of replacing it. As said before, think also about tube rolling: small signal tubes first, then large KT88.
As far as preamps, I looked into the McIntosh models but decided for a Lamm LL2. While the ergonomics of the Mc are FAR better (remote, and all the bells and whistles), the sound of the Lamm was way superior to my ears and I concluded ergonomics were not as important to me. Have had that pre for 3 years and I love it. Also rolled tubes.
Other preamps I recall on my short list at the time: First Sound Presence, Atmasphere.
Do you need a built-in phono section?
As far as preamps, I looked into the McIntosh models but decided for a Lamm LL2. While the ergonomics of the Mc are FAR better (remote, and all the bells and whistles), the sound of the Lamm was way superior to my ears and I concluded ergonomics were not as important to me. Have had that pre for 3 years and I love it. Also rolled tubes.
Other preamps I recall on my short list at the time: First Sound Presence, Atmasphere.
Do you need a built-in phono section?