I'd be careful trying to hit 400lbs. Depending on your build (and your age) it could pose a risk to other parts of your body if not in tune with overbuilt chest shoulders and arms.
My max was 300 in college but now I'm over the ego thing of the bench press. I aim for overall fitness, core, cardio and agility. I still lift free weights but my bench is only mixed in once a week and typically do not go over 225.
At 43, I'm 5'11" 200lbs, play ice hockey twice a week, ski 10-15 times a year, ride the bike and do a varied workout 2-3 times a week. My goal is to still kick ass on the 20-30 yr olds I play and ski with.
Trying not to preach but To live a longer healther life (and still "perform" with all those chicks) I would get off the bench, mix in a team sport, focus on core and lose 30lbs. Get on a plan and it will change your life. You'll be looking like Laird Haimilton before you know it!
Interesting article here:
http://www.bestlifeonline.com/cms/publish/fitness/The-Best-Shape-of-Your-Life.php