Gotcha. Well what ever you go with I'm sure it'll look great. I actually ordered an aluminum aftermarket tank from LCRAutowerks two weeks ago or I'd be all over that ARC tank.
BTW I have the same intakes and decided to use red couplers over the blue, it would prolly look good for you as we'll. I included a pic below.
One more thing. I noticed you have the NRG titanium washers. How well do they look with the intakes? I bought Password JDM's washers and they are terrible.
ImageUploadedByTapatalk1370740138.483731.jpg