Perform a slow search in these forums, there's a few threads discussing this topic.
A personal one that I liked was this one for under $100 from IKEA. Rather plain, but nice. There's been some question of the inner width of the shelves, so you'd want to check to make sure that your equipment would fit. Don't know how much you want to spend, but there are even nicer options for a few hundred $ more.
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