Don't we all wish we could gain 15lbs of soild lean muscle and still have abs?
I'm not gonna harp on you because your not the only person to ever come here and type statments like that but your answer lie's in your diet.
You wanna get big you gotta eat big plain and simple, Bulk up first then worry about your abs later. There's entirely too many guys on this board (and others) that think they can gain 15lbs of soild muscle and still look great on a beach..Doesn't work that way. Sure there are guys that have great genetics that can bulk and cut at the same time but their few and far between.
Whats your diet like?