To answer questions:
Yes, lots of silicone was used inside the boot lip, around both edges both inside and outside the truck. A buddy of mine does spray in bedliners, and will be spraying over the box, so you won't be able to really tell what it is. I did this last year on another S10 I had, with 4 Alpine Type R 10s, and the box in the bed turned out really well actually.
I'm not super worried about it getting stolen. Needless to say it is bolted down quite securely //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif
Some might say this was overkill for a single 10, but it's what I wanted to do and it sounds great. I didn't want to sacrifice legroom by building some box behind the seat, nor did I want to go with a different sub, and the mounting depth on the X is close to 9 inches.. way more than I have room for.
As far as the resale value goes, the truck is a 2003 Single Cab with 32k miles, that I paid $5k for. Wholesale book on it was $7500. I bought it for an economical daily driver that I could do whatever I wanted to. I plan on keeping it for 3-4 years, during which I'm sure I will change out the system on several occasions. I do plan eventually on doing a few more subs, but I'm not really in it for SPL competitions.
As far as the Dynamat goes, I got 2 bulk packs for under $200. I tried eDead and hated it, and Second Skin is here locally but it was actually more expensive than the Dynamat when I priced them both out.
Hopefully that answered a few questions //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif I'll get pics up when the bedliner is done.
Mike