I was a web desinger for over 10 years before moving into another field. Gerally any type of site builder is going to be very difficult to work with and not be of good quality. As far as a company, I would go with Elite Strategies Llc http://www.elite-strategies.com/.
They are the only company that uses authorship in the search results (the picture next to the results) which means they are pretty much the only ones that use cutting edge technology.
For a site like that, anything more than $1000 is going to be too much - you can always bargain with these people, generally the only cost involved is the designers time.