Since a NAD 1020 was mentioned, I have to throw in my 2 bits worth.
Because I'm poor and can't afford to pay attention, I focus on gear I can get for cheap. I flip gear from time to time to feed the habit but have hung onto 3 preamps all considered to have good phono sections. Two are NAD's one of which is a 1020. I must say that to me, a1020 has a very distinctive sound that I like a lot. I've read comments that call it "dark sounding" which I took to be a negative criticism. But after living with one, I understand that description a bit better. It sounds corny but my perception is that music " wells up from blackness"' if that makes any sense. If I replace it with something else, I find myself fiddling and adjusting things to "take the edge off". Hooking up a NAD again is a bit of relief because I leave the tone, EQ and DBX controls alone. Might not be to everyone's taste but I like old NAD preamps.