Well as one of the two folks who wrote the PM mass gain program, I'm kind of partial to it. That said, Bill Starr is no slouch by any stretch of the imagination. So I would say this - if fundamental strength is your goal, stick with Starr's program; if mass and/or Olympic lifting are goals in addition to strength, check out the PM program.
Like Mike said, you can't do it all at the same time. Metabolic conditioning can be brought back up to speed very quickly in my experience, and it will exceed previous levels with a greater amount of strength. So unless you're making great gains still doing CF, I would drop it for now. Spend maybe 12-16 weeks or so concentrating on a strength/mass program and go from there.