In addition to poring over our reviews and checking out the vendors' sites, using the price filters at a reseller like Newegg.com can help you see different configurations at different price points. Some manufacturers offer lots of differently weighted versions of the same laptop (say, more storage in one config, a better GPU in another). Playing with the filters on these sites can be an illuminating exercise in give-and-take.
Dell Home, via its Member Purchase Program, offers its Dell 15.6" Laptop Gaming Backpack in Black/Red for $28.49 with free shipping. That's tied with our expired mention from four days ago as the lowest price we've seen for this bag. (It's the best deal we could find now by $20.) It accommodates laptops with up to 15.6" screens and features a shock-absorbent EVA molded front shield, adjustable shoulder straps, and a deployable rain cover.