i tried eating a ton back about 6 monthes ago, 'bulking' as everyone here recommended. i only ate 3000 cals a day, and i gained a TON of fat, probably about 15lbs in 2 monthes, but I did put 15lbs of muscle on too. but then, to lose the goddamn fat, i lost almost ALL the muscle. personally I will never 'bulk' again, even if it gets me some more muscle (w/ fat) because I work out to look good, not fat.
i think it all depends on your metabolism, if you think its really hard to take in X amount of calories, maybe you just shouldnt.