I don't know about the webprep, I was referring to the Kaplan lectures (video+audio). From my understanding the webprep are just audio right? In any case, the quality of the teaching would be the same if the teachers are the same.
Barone is terrible - of course you'll have to stick to Goljan for patho
Stephen Daughtery for Behavioral Science is awesome.
Robert Dunn for physio is okay. He can be extremely monotonous at times, but he does teach and not just read the text. In the Goljan audio, Goljan talks about another physio lecturer, Passo, whom he praises a lot. If I were you, I'd give Passo a try if Goljan recommends him so much.
Trevor of Pharma is good. He's the Trevor of "Trevor and Katzung's Pharmacology". He's the "fake from england" that Goljan keeps joking about in his lectures. Trevor adds a lot of background to the lecture notes, so I'd definately listen to him.
I've got Lionel Raymond for Biochem. He's okay, he does teach the subject, but he won't be winning any Mr. Charisma contests anytime soon. Goljan talks VERY highly of Hansen for Biochem. I haven't listened to her, but again if Goljan recommends her as "one of the best in the country" I'd go for her, given the choice.
Hope this helps.