Gabriele Azzaro wrote:

sound advice... I am also investigating into an MAudio FW410 + ProTools,
which would then enable me to use a better mic, like the Shure or Neumann
TLM103. 87bd s/n ratio sounds so impressive to me...

The FW410 doesn't have a really find mic preamp, but it's probalby
better than your Audigy, and it will allow you to use a greater range
of microphoens. However, I still suggest that you start slow and simple
and take advantage of what you own now.