Hi Felix,

Wood crafting very often requires some kind of artistic touch, like sculpting, bas-relief, VCarving, inalay and micro detailed surfaces that are hard to produce with a NURBS based software, and requires an SDS approach. I can't imagine an oak or a grapefruit leaf modeled starting from curves, extrusions, sweeps and so on. On the contrary, also often in such artworks there are some components (rims, structures) that are best modeled using hard surfaces techniques (NURBS). To reach your target, especially if you later need to obtain a CNC toolpath, I recommend you to try Aspire, an artistic CAD/CAM package by Vectric. It has powerful vector based 2D to 3D tools, sculpting and bitmap to 3D support to obtain very complex bas relief, that you can easily integrate in your project. Aspire also includes a good CAM software and many postprocessors that cover almost any kind of CNC milling machines and routers.
You can also consider Luxology modo to add details to your works. It is more complex and expensive compared to Silo. But it has a great advantage on other SDS based modelers. You can model in a low subdivision degree and use many tools to deform your surfaces using textures and images (for example, with vector maps, normal maps and so on): the model is then represented with incredible high details, even if the real geometry remains very light. As soon as you are sastisfied with the results, you can "freeze" the geometry, and any effect you have applied is then transformed into a real geometry that you can mill with a CNC machine. As far as I know, this feature of modo is almost exclusive.
Another advantage is the presence of a good renderer, that you can use to present your projects before their actual phisical production.
Attached you will find an image of a rendering of a particular of a furniture, done with MoI, modo and Aspire.

Good luck

- Pietro