Im new to SEO and still trying to figure things out. I'm not 100% convince on having backlinks from HIGH PR or LOW PR will have much advantages. But by all means if you can get higher PR backlinks it wont hurt. All my backlinks are from low pr (average pr 2 or 3). I manage to be on page 1 for two keywords. Also 2 keywords on page two. This is just google. I'm getting similar result (different keywords) for Yahoo and MSNLive
Page 1 - Google
elk grove pc repair
sacramento computer repair
page 2 - Google
elk grove computer repair
computer repair sacramento
Don't get me wrong. If I have a choice between High or Low, I will take the HIGH pr anytime.