I did something very similar for the entertainment center in my basement. I used Akurum cabinets from IKEA and cut them down to remove the portion for the typical top drawer. On top, I placed a stained butcher block counter top. For the side panels and cabinet fronts, I used high gloss white and gray panels. It ended up being less expensive and much more sturdy than typical HTPC furniture.
4/14/14 at 1:33pm