I'd even suggest trying an incline as low as 10-15º. I use some 4x2 timber to pack up the head end of my bench as my incline bench starts at about 20º. It's noticeably different to flat bench.
Like XFatMan said, adding in some dips for more of a decline bench effect is a really good complement to incline bench (and flat bench for that matter).
"Be the best that you can be."
Deadlift: 215kg (474lb) - pre-hernia!
Low-bar Back Squat: 190kg (419lb) 16/04/10 @BW ~210lb
Bench: 130kg (287lb) 01/02/13