Engine sound is also very important to me and I like the old school sound of high compression and a big cam at idle. But sound is also very individual like beauty. All I can offer is that I loved the sound of the 408 ci Windsor in the Cobra I used to have. Of course it was heavily modified with aftermarket crank, pistons, heads, cam, etc. . . When I started building my Cheetah tribute my goal was to have a sound much like the Cobra. It has a 427 ci Chevy engine with all aftermarket components that hit 600 HP on the engine dyno. It sounds good, but I still like the Cobra a little better.
Here's a short video of the Cheetah at idle.
Video