My page ranking is currently a 4. I am working to get it higher. I have spent time taking off links on my web site that are under a 5 PR. I am also seeking sites to link to with PR at 6 or over.

Here is my question. Does it matter what the site's main page ranks at OR the sub page they have my link?

In some instances the ranking for the site is a 6 or higher, but the page my link is located is lower. Does this matter?

Any help would be greatly appreciated!