I agree fully with Guidocorona's assertations of the ARC Ref 3, and yes I am an owner. If you are looking for tube-like sweetness, this is not the preamp for you. It definitely has the 'fuzz on the peach' tube like palpability to me, but is not 'sweet' by any stretch of the imagination.
I've heard the VAC Renassaince mk II, BAT VK-32SE and CJ Premeier LS16 mk II, all sounded much 'sweeter' or 'tubier' than the ARC Ref 3, IMHO. Maybe one of these will please you.
Cheers,
John