I've been debating whether or not to build a new system myself again, but the savings aren't like they used to be. Years ago, you could build a top system for a fraction of what a pre-built system cost. Now, you can go on sites like Newegg and buy a loaded, super fast system, for under $800. Even if you're on a budget, you can buy a muti-core system for under $500. If I built these systems myself, I'd be lucky to save $100.