I have not heard the X-Static but have the OB-7. As other have mentioned, they are both the brainchild of Danny and share similar principles.
While both should prove to be exceptional options, the OB-7 can and does use better x-over components and can be tweaked further.
As pbrstreetgang mentioned, I would evaluate the application and base your decision on this. I also agree that if you are looking for more of a dedicated 2-channel setup, the OB-7 may prove to be the best choice. This would also allow you to custom build the cabinet to your preference. I use a custom built pair in our reference system (shown below) an haven't looked back. In fact, I am building another pair of the OB-7 as well as a pair of the OB-5 for our other systems.
As far as the crossover goes, it does come with a schematic/diagram but I would talk to whomever you plan on building it for you to see if it's something they are capable of doing. There is a lot of threads here on Audio Circle to help guide you on any questions, concerns you may have. Some of them are also build threads. Many of us have built these speakers. Also, don't skimp on parts. If a few extra bucks won't kill you, I highly recommend the SoniCap Platinum bypass capacitors for both the midrange and tweeter sections.
Either way, let us know what you decide and keep this thread going with your impressions.
