by flared ports, are you meaning aero ports??? port noise, turbulence, and in a case like mine, aero's are garbage I only think they any good for sompeting a hatch back, I like my large boxes with stupid slot ports LOL... I would do the 2-15's they will sound insane. I dont really PERSONALLY like the sx subs, I would take the cash and run, but quite honestly it all depends on what worx best for you