Welcome to the weekend edition of the best deals from across the web. Leading today's deals is a new XPS 8700 Performance Desktop from Dell. For a limited time, Dell is offering its 4th-gen Core i7 "Haswell" model for $699.99 (same price as base Core i5 model). You can also save big on Lenovo IdeaCentre Horizon 27" All-in-one Tablet PC or...