I always hear my neighbour start his DMS tuned F10 BMW M5, and think it's a very nice sound indeed. Kind of an angry bark followed by purposeful burble. It must be said I don't hear him start their Skoda Octavia estate or new Land Rover Discovery (but it's a Land Rover so it's probably broken down anyway).
I'd be more than happy to hear an AMG V8 start up. Depends if your neighbour likes cars. If he does, you'll be fine.
I personally love the sound when my neighbour starts his XKR of his XFR. But having said that, he doesn't seem to have too many early starts. And I'm fan of V8's anyway. And I like the fellah.
I'm not so keen on the noise my neighbour makes when she fires up her 56-plate diesel Mondeo at 6.30 am. It's incredibly loud and booming. She sometimes then lets it idle on the drive for ages (thanks....) and then, as the icing on the cake, proceeds to rag it down to the end of the cul de cac with the valves bouncing off the bonnet. It's probably only doing 4,000 rpm but sounds like armageddon.
But back to your question the only way to be sure is to listen to one going through it's cold start routine. If you can hear it clearly from behind a closed door then you have your answer.