Ben,
Since you are planning this as a SPS dominated tank, for my money I would get the Hammerhead now, instead of a Barracuda. I understand the Hammerhead is $30 more, but gotta like Krish's idea of FLOW FLOW FLOW when it comes to an SPS tank.
To help with costs, you could plan your closed-loop plumbing similar to how I have:
You know you want the Oceans Motions 4-way ($339). I want a Motorized Ball Valve (~$450). With the cost of everything else, and in keeping my better-half from chewing off my backside, I plumbed my closed loop FOR my Motorized Ball Valve... but currently have PVC taking its place. That will be my next "Add-On" (and, I know there will ALWAYS be more add-on's), but helped keep things where I could afford them. My plumbing is ready, I just need to close some valvues, and install later when I get the extra $$$.
Would my system be better with the Ball-Valve in now. OF COURSE!!! Would I have my in-wall if I had spent the extra money, AND still be married today??? Possiblly not!!!