{Question }Keyword Research - PR vs. Backlinks

Hey guys, so I'm currently getting some experience doing SEO for clients. This is my first one, and it's a relative so this is mostly just for experience for the future. So I'm doing some keyword research and I found a pretty good long tail, except that the top ten sites rank high in PR and site backlinks but dont really have many backlinks for the page that is ranked. This is a picture.



My question is, is this a good keyword because the sites that are ranked only have a few backlinks? or should I look for more keywords because their PR is just too high.

Thank you very much! I appreciate all your input greatly.

Go for them. There PR maybe high because of good age and high PR domains. But with decent backlinks, you should be able to rank them.