I can see what you're trying to do here (all-be-it failing) with the entire Xplosion thing. You want a word that sounds "Cool", "Edgy", and "Hip". (Is hip even a word you teens use anymore, or am I just dating myself?) But in reality it just doesn't work overall. Really the only demographic that respells a lot of words using a gratuitous amount of X's is the teen to twenty crowd, and those involved in Extreme stunts/sports/ etc. I doubt very much your magic is going to fit the extreme grouping, so that leaves your target market restricted to primarily just the teen to twenty group.
Now while performing for your peers is a great way to establish a lot of things (esteeme, respect, popularity, changes in social classes, branding name/ image, etc) the one thing it probably won't do is make you any cash. Lets face it, the teen to twenty demographic is usually perpetually broke. Besides, that demographic doesn't usually hire magicians to do magic for them anyways. Which begs the question: "Is your goal to do magic for profit?" If the answer is no, then by all means continue on with what you're doing. It's ideal for the kind of people you're going to be around. Then again, if that were the case then having a website is a bit silly, since most of your friends are going to know you by word of mouth. The website would serve next to no function to you.
If you are looking to make a few bucks doing shows, then the website is of importance. There for it should be professional. See above posts, because I do agree. Xplosion isn't professional. Not unless, like I said, it fits your show and what you're doing.
As for your tagline, I highly recommend you go to the library and read a few books on marketing and sales. I'm actually fairly confident that they have a few books out there with nothing but tagline suggestions in them. Or just Google "Promotional Tag Lines" and see what pops up. This will be a good homework assignment for you, and the experience will well be worth the exercise.