Sofa Fabric

Today's my birthday and we're celebrating with our visiting family, so I'm taking it easy while they're still here. But tomorrow I'm hoping to get started on the cushions of the new/old sofa.

I bought the velvet yesterday at JEM. It's really hard to photograph because it has a bit of a sheen to it and the color changes in the light (love).

So the real question is - do I do a black welting or just a self welt? I'm worried about making piping with the velvet (it's tricky because it's so thick and velvet pile often rolls weird), but also I think black linen would look pretty amazing!

What would you do?