The problem is the motherboards really, good boards for the i7 are overly expensive and personally I don't rate the i5 as good value for money. As I said before though, step down a generation and you can get a good Intel system for your money but still be faster than a similarly priced AMD system. The only thing this won't offer you is future upgradeability, for that you really need to go the i7 route and spend an extra £100-150.