That poiler looks good but i would go for custom 1, the theory is if u look @ the intergrated NSX boot spoiler
u can tell that its been intergrated in the boot now try to picture this but on a Civic Coupe it would rip + its not dificult 2 do iv seen it done on a BMW on 1 of my GTi mags and it came out looking good the price would end up about the same has a replica spoiler