hi, i'm just seeking opinions on which would be most popular choice for adcom preamp line level, and likely to give the best performance. i realize, the 845s run rather hot without heat sinking but more interested about the performance issues from those who have had the chance to compare the two. i just need general impressions as i realize what works good in one component, might not be all that good when used in another. thanks for any opinions, crippledchicken 