Per Wiberg over Joakim Svalberg any day. Joakim is too fancy, he does to much. I always prefered Peter over Fredrik as well, mainly because I think Fredrik overplays a lot. Don't care much for a lot of his solos. Peter and Mikael had this perfect balance with their guitarparts. '
With that being said, I love Opeth, and they are amazing live. Every album so far has been something different, and I love all of them.