The Wesena ITX7, HDPlex H10.ODD and Vidabox vCase3 are all great cases with a direct focus on HTPC aesthetics and each has their pros and cons. The one con almost always present when discussing HTPC chassis is PRICE--SFF chassis with home theater A/V focused designs are frequently over the $100 price range, not including the power supply. What Habey is offering in their EMC-600B enclosure is a stylish aluminum SFF chassis for mini-ITX only that occupies a tiny footprint with a nice appearance to fit just as appropriately in your A/V stack as in your bedroom--and it includes a power supply, all for under $70.
Any major computer upgrade generally requires a full software reinstall too. No so if you heed the advice in the guide to Upgrading a Motherboard without Reinstalling. PCSTATS Tips