Duplicate Content - Let's review all the options shall we

HI All,

Our company sells a variety of services (as do many) and we are
looking for ways to promote individual services in addition to
promoting our whole suite of services using our main company website.

There are several relevant domain names available containing the major
keywords for the services we wish to promote, for
example: .....websitedesign.com, .....SEO.com, .......graphicdesign.com.

How do we make the best use of additional optimized domain names?
1. simply grab up the optimized domain names and use 301 direct to go
to appropriate pages on the existing company site.

2. register the optimized domain names, use our existing site template
to create a new site and migrate the appropriate text to the new site
(graphic design text to the .......graphicdesign.com site etc.) then
edit the text so it is not recognizable as "duplicate content".

3. register the optimized domain names and create individual blogs for
each then migrate the appropriate text to each new blog, no text
editing required becaus - .
- I understand that Google will not deem text in blogs created in
WordPress or Blogspot as duplicate content, is this correct?
- What about Drupal blogs, do they have the same "duplicate content"
immunity?

Look forward to your reply with great interest.
Holly