You need to fix those leaks and tighten everything up. If you have the original system the genuine gaskets are best.
Currently in combination with the Remus I have Fujitsubo SuperX headers, and a Metal Matrix 200 cell metal cat. A good exhaust sound was not my priorities when I fitted these, but I like the sound - a bit deeper than stock with no raspiness, and just about the right volume too. In fact surprisingly the exhaust volume is actually quieter than when I had the stock headers.
A sound clip wouldn't be relevant anyway unless you had the rest of the system the same as mine.
BTW, I have tried different combinations and found previously with the Remus, the stock headers and a 100 cell metal cat that there was an annoying drone about 100kph, and it was a bit too loud for the street.
The problem was the 100 cell cat, and swapping to a 200 fixed the problem.