Merkuri
Explorer
Getting a computer through a big box store may be a good idea. It's cheap and easy. The support not so good. A local Mom and Pop can be a good idea, if you can find one that will survive.
Quite a few years ago my father tried to make a business building and selling computers. Even taking his time and searching for deals he was not able to compete with big-name computer companies. It would have been cheaper for him to buy pre-built computers from these companies and cannibalize them.
But he offered service with every computer he bought. Years later after he had officially given up on the business he still occasionally went to customer's houses to fix them up, good to his word.
I'm a fan of Mom & Pop computer stores, but they do have a hard time surviving because it's impossible to compete with big companies who sell pre-built PCs.