Well,
If you want an opinion, I can give you one, mate.
For bulking, I do either 4 exercises with 4 sets per or 5 exercises with 3 sets per. The reps are kept between the 3-6 range. For instance, if you can incline bench with 325 for 5 reps, then I would do this:
Set 1 is a warmup. Use 135 or so to get you warm.
Set 2, go up to 225 for 6 reps
Set 3, go up to 285 for 3-6 reps
Set 4, go up to 325 for 3-6 reps
IMO, if you can handle your best weight for more than 6 reps with good form, you need to go up until you get in the 3-6 reps range but still be in good form and safe.
Reason behind this theory? More weight=more strength=more mass. I think that most will agree with this.
Just my opinion, mate.
Cheers,
KJ