Case choice is very much one of personal preference. I personally wouldn’t touch a big case with a touchscreen on it. Is there any reason in particular you want a bigger case? There are a lot of cases more modern than the Antec that are slim and quiet. Definitely consider all your options with cases and if it is within your budget, get a quality case as it will last you many builds and you’ll have to look at it for a long time to come.
Here’s a guide for building your HTPC and here’s one for assembling it.
