Naim preamps are very dependent on the outboard power supplies used. I have never compared Naim with Audio Research, but if you get the 282, it needs a minimum of 2 HiCaps to really get going, but the Supercap really transforms it. But I’ve never heard any Naim preamp mated to anything except a Naim amp. I remember someone on the Naim Forums using a 252 with some SET tube monos and it was supposedly excellent.