Few items jump out initially:
The text in the page starts out with
[h=2]Welcome![/h]Welcome to The Sign Company of Dallas!
The Sign Company of Irving has continuously
Is it 'of Dallas' or 'of Irving'
The end of the page has the post from the other day about Acrylic signs... valid discussion point, but if I were looking for a sign shop, I wouldn't be thrilled with a public declaration of 'these are problems, how do I fix it'. I know that isn't the intent, but that's how it comes across. Flipping that and rewording the whole thing to be 'these are problems and here's how we avoid them' might be ok, but I'd skip it overall.
One of the first things I tell my students when approaching SEO is to run the W3C validator (validator.w3.org) The more closely it validates, the easier it can be indexed by search engines and the like. Items like Alt attributes are also critical in that.
Not sure what program was used to create it, but you really want to avoid inline CSS whenever possible, offloading it all to external CSS cleans up the page and makes edits quicker and easier.
The aforementioned comments about the logo redundancy can be paired with the real-estate used by the header and top of the page. Try to keep it to where the actual content comes in 150-200px from the top of the screen; on smaller screens, virtually the whole page is used up by the header and page header graphic, there's almost no content visible to draw users into the site further.
I do like the overall look, feel and visual hierarchy of the site though, definitely heading in a good direction.
