I'm in the same boat, with a kid (on the way) and not wanting to have my investment all messed up, even tho in the end its just materialistic stuff.
ideas I came up with..
1. wireless hdmi router. Monoprice is the only place I found one that didn't have too bad of reviews and didn't cost an arm and leg.
http://www.monoprice.com/products/product.asp?c_id=109&cp_id=10110&cs_id=1011011&p_id=8087&seq=1&format=2
put your htpc in the closet it might risk it from getting damaged.
I haven't tested this product out yet, since it was sold out for a while.
Last is maybe getting a case that has a lock on it.
Im currently upgrading my case (nmediapc 5000b) to a silverstone gd07.
anybody gone the wireless HDMI route??
Hopefully that helps.
Edited by BlvckBox - 8/11/12 at 1:29pm