Buying professional computers is a quirky business because a professional grade machine looks basically identical to a “home” machine to the untrained eye. Usually once or twice a year we prepare a quote for, let’s say six professional-grade laptops, and submit to a client for approval. The client then turns around and buys six laptops from Best Buy. Comedy (and tragedy) ensues.
From our perspective, the big box computers should never even be considered for business use, unless you are a sole proprietor working from home. Even then, we still wouldn’t advise it.