Lookin good man. With the right setup, you will be able to out crawl a lot of these guys that are running aftermarket chassis'. I know I was REALLY surprised as I was testing the dual triangulation skid plate during the design phase at just how much it improved the handling of the rig. When properly dialed in with the right parts (like the dual triangulation skid plate, suspension, etc...) that will be a hell of a rig, able to compete with anything that has a driveshaft.
I would DEFINITELY go with the Castle stuff over the rooster. The Castle stuff is completely programmable, and will handle 3S or 4S if pushed. The Novak stuff will smoke down under high voltage, isn't nearly as water resistant, and isn't programmable. Keep in mind I was a Novak guy with two Goat systems and I've talked several people into getting started with the Rooster setup because of the cost. But if I was going to spend the money, I would go with the Castle everytime. If you don't have a Castle Link Programmer, go with the Mamba Max. The sidewinder is around $74.99 and the programmer is about $21.95. For just a few bucks more, you can get the mamba max which is made of much better components internally, will handle more voltage, and has a built in USB port so no programming kit is required.