I've had V&H straightshots on my FXDL for a little more than a year now and have run them with and without baffles.
With the baffles there are reasonably loud. While they don't produce too much noise at idle/low rpm, it is a good, throaty sound. Once you get going though they start to sing.
Without the baffles, they are definately loud. Friends said they could hear me coming from 3-4 blocks away. This does come at a pretty noticeable loss of performance though.
Also, at least in my case, when the baffles are out during shifts or when I get off the throttle and let the engine slow me down there is a pretty annoying report that sounds kind of like "wa-pa-ta-pa-ta-pa-ta" until the RPM gets down a bit. Really detracts from the "coolness" factor. I tried several different aftermarket baffles to try to get a balance between performance, volume, and getting rid of the report but never really found a good setup. Asking around it sounded like the torque cones would do this but I never tried them.
What I eventually came to for the best compromise was to leave the baffles in for day-to-day riding and take them out when I got to events. Works for me anyways.