Use the local company name, you are going to need that credibility. You are trying to enter a business that has a failure rate far greater than a local computer repair business which is already kind of bad. National SEO is no joke the person you should really be looking at is lisa (callthatgirl) as my business is struggling. With the loss of all quality rootkits out there there is not a whole lot of demand for my services just a microsoft office issue here and there. As far as the free estimate goes, I don't see how i'd be able to charge for a diagnosis with online repair. Oh sure i'll take a look at that for a charge of 40 dollars, oh sorry thats a hardware issue I can't help you but thank you for your patronage? Its already hard enough gaining peoples trust thats why i got the cute logo, floating reviews, and the 100% trusted thing at the top right (I threw that together in photoshop its not a provided logo by webutation or anything).
Oh and don't try to nationally rank up for any keyword/phrases that brings up local results as that is the most pointless endeavor a person can do.