I was considering WordPress for a small shop. Though I was under the impression that WordPress was more easily hacked and not as "professional." Don't know why I have a negative view of it.
Wordpress is likely to be more secure than anything an above average developer can roll up on their own. Anything that's broken is likely to be fixed faster (and discovered faster to boot).
The professional measure of a website that's going to matter most to a small business is the design. On the technical side that includes the ability for any old shad tree mechanic to maintain it. Wordpress definitely fits that.