Lian LI's PC-B25F

Lian Li has just launched a new completely tool-free mid-tower case recently. This is not a HTPC case but I think it could sit beside your receiver without much problem as it is also in black. Furthermore, it's got plenty of space for your hard disks. (source: http://www.lian-li.com/v2/en/product/product06.php?pr_index=366&cl_index=1&sc_index=25&ss_index=62)