You watch those kids hey Chal - I used to talk to him at his shop and get advice when I was in Van 5 months of the year when he was working at NCIX before he struck out on his own (he still does work with NCIX and even videos with them). Good bunch of young guys doing what they love. You should see their new shop now, pretty impressive for a bunch of really, really young guys, not that they don't have a ton of powerful and $ support, but they are doing well for themselves with sponsors/adds, and while they make mistakes with info sometimes, they are improving at a great rate IMO. Just got another Ducky Shine 5 in Cherry Blue from them last week in fact.
I'm not huge on the looks thing, windowed cases are far louder IMO on their own, but the last couple I bought had windows mainly due to its hard to find a could full size tower without one. 750D, 600 (my favorite Corsiar full tower), 780 and 760 and so on.
I'm waiting for Broadwell E and Pascal, and that build is going to be my first liquid/block/res/pump full liquid cooled system, so I want a window for that obviously, for not just looks, but obviously to watch for drip drips.
I am interested in that forced filtered air idea, have to look into that.
And you're right, the number of custom cooling and just custom PCs in general is NUTS out there - so many great designers. I'd still like to make a custom mini or micro some time as well in a 380T or a BitFenix Prodigy (obviously not filtered air).