+1 to the lack of soloists.
BUT then again as I have found Its very very difficult to find a soloist that will fit in with your particular song. eg I have a few of my own country songs that I am laying down in band in a box, the main and only country soloist for that is the cowboy electric guitar soloist, but the phrases that it plays doesn't really fit in with the songs. I would think that will be the same for most genre.
Although I'm not a great lead guitar player I think my own simple lead lines will soound better.
Rhythm real tracks no problem.
joe
Ed-your website is a fountain of information in itself, well worth the read, some of Ed's ideas on mastering.
http://www.pointconceptionstudio.com/FAQA/FAQ09.html