Driving my 06' with the stock exhaust just reminded me of driving some old English car. You know, where it is just sickly, meak and mild sounding. That is the best way I could describe it. It really wasn't for me. Once I put on the full Bellanger Exhaust system (Headers, Hi-Flo Cats, No X-over and cat back) it now sounds REAL exotic and racey. I wouldn't change a thing now and feel the Bellanger sound is the perfect sound for the Viper, IMHO. It is different still than anything else on the road, but I really, really like the sound of my Viper now.
There is just something about a V8 with a perfectly tuned exhaust though. My S351R with the 408 Stroker, straight gear Vortech and Bassani X-Pipe, as it is about the best sounding vehicle I have ever heard or owned. Not too loud and not motorboat sounding. It is almost a little Nascar sounding.
Though I am so familair with V8 sounds my whole life, all I can say is I prefer both equally for totally different reasons now.
I do remember hearing my first Viper exhaust, which was a stock 1994 RT/10 and I remember thinking, is there something wrong with that car? It sounded ike a Briggs and Straton lawnmower. Pretty much one of the worse sounding cars I have ever heard and one of the reasons I did not buy a Viper for a long time. Well that and money, at the time.

The older GEN1 cars had real sad sound exhaust in IMHO, but the car got out there for us to purchase so it is all good. Like they say in the movie Troy, "We play with the toys the Gods give us". A V-10 was never mean to be choked off with a restrictive exhaust. When free to breathe, they sound REAL good.
BTW It doesn't bother me or the neighbors too much, but I had a neighbor across the street and down from me, who came out one morning after I started up the car and he had a broken plate in his hand. He said after 5 minutes, after I started my car, one of his wife's plates mounted on the wall, fell out of it's mount and broke on the floor. He was laughing as he never liked those anyway, but I have had a few neighbors comment that they can feel when I start my car. Good thing he doesn't care too much as his Yenko Camero is pretty loud itself. I did feel bad though as I didn't notice it that much.