Diofan,
I bought a shelf that works well at a home improvement center (Lowes or Home Depot,forgot which one). The supports are attached to the studs but are not visible once the shelf is in place. It's very sturdy and I think it looks pretty good without the visible supports. I believe it was less than $40 and they have various sizes. You can see a foto by clicking on my "system" tab below. Hope this helps.
I bought a shelf that works well at a home improvement center (Lowes or Home Depot,forgot which one). The supports are attached to the studs but are not visible once the shelf is in place. It's very sturdy and I think it looks pretty good without the visible supports. I believe it was less than $40 and they have various sizes. You can see a foto by clicking on my "system" tab below. Hope this helps.