The DD motors are very picky and dont like mods unlike the DE. Being maxima esque isnt as bad as it seems. Cops thinks its a maxima and maxima owners get confused. Save your pennies buy a coupe or dp a engine and tranny swap. Engine choices are pretty vast youve got the VQ35DE, VQ30DET, VQ25DET, LS2, 1/2JZ and rotary and go completely stupid.
VQ25DD are not a tunable/modifyable engine like the VQ35 is. Its a lost cause. Trust me ive been down this path and got told the same thing. Keep it as a daily and get a coupe or a stag