For me, inclines work better. Over the years I have had tremendous gains in pectoral development and major increases in strength from using incline movements. When I perform inclines, I make sure my butt is firmly planted in the seat (Arch deluxe by Jay Cutler). Next, I will push out my chest, as my upper back is firmly planted onto the bench. I typically work with a 30 degree angle, but sometimes I will perform high incline presses at 50 degrees. I lower the bar in a controlled motion about 1 inch below my collar bones, then I explode towards the top position. I can achieve a tremendous pump by perfoming one set. This exercise DOES NOT over-emphasize my delts. It is amazing how many guys neglect inclines as they continue to use sloppy form on the flat bench. The funny thing is that none of these guys have pectoral development. Overall, I am very satisfied with incline movements. I also like to combine inclines with heavy parallel dips, dumbbell flyes, and pull-overs. After 9 sets of chest work, I am fried.