I have rebuilt my web hosting core with XU4's and a C1 and a new C2 I just ordered. A 3 server, load balanced and reverse proxied system that I'm hosting over 10 clients on and offering a local radio station streaming with icecast on. Everything is secure and working like a charm. I love my ODROIDs. All the serving power at 1/10th the actual power requirements. Next step for me is to run the whole thing off solar and batteries.