I am definitely going to go with the $185 setup. Twice the tank for $20 is too sweet to pass up. I will let you know when I get it, and how well or if it works. Thanks for all the input everyone.

I did see that episode of mythbusters and it was awesome how that cylinder took out that wall with ease and even damaged the wall behind it. I know I wouldn't want that zipping around inside my Liberty while I bounced down trail. Although I am sure it would be pretty cool to see it happen as long as no one got hurt and it wasn't my Jeep.

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My Jeep Build ----> Big Black