Sound and revs can be sorted with an end can and gearing alterations, none of which are going to be crippling expensive or difficult to achieve.
If you love the DL650 and want a more classic appearance though then an SV650 might be a solid option and you'd probably break even or profit from the swap given the lust for anything adventure related these days.
If you want really throaty and lazy revving then get an SV1000N ;)