guys id like some help

theres no serious problems or anything, im just trying to find an aftermarket exhaust to get. ive done a little bit of research and im trying to decide between the invidia n1 catback and the dna motoring catback. i like both sounds, however the dna is much cheaper. but the only decent video i can find of it theres a whistling noise at high rpm. obviously im trying to avoid that, but i dont really want to pay hundreds of dollars as im on a budget. does anyone have any input/experience with either of these? or maybe theres a more budget friendly one out there that also sounds good that i havent found yet? im not sure. id prefer to not get just a muffler, but ill take what i can get. thanks guys