Not sure where you're getting that, but no one said that at least that I saw. Just don't stick a fart can on there and don't go straight pipes. Sound is personal preference. In my opinion, Magnaflows sound the best of the reasonably priced mufflers. A few like Flowmaster, but most hate it. I run a pair of Magnaflow XLs with no resonator and I'm perfectly happy with how it sounds.
No, it will never sound like a V8 no matter how hard you try. The best you'll get is idle.