Forum Moderators: martinibuster
First, welcome to WW. This is a great place to get good information.
On to your question.
The relationship between pageviews, or rather impressions and clicks is the CTR (click thru rate). That varies so widely between sites and topics that it's hard to make any kind of meaningful statement about what it might be. I'm not real sure that's what you were asking though.
Page views (how many times someone looks at your page) relate to ad impressions in that you should get an impression for each view of a page where you have the adsense code installed.
Impressions are each time the ad code is called. If you have an ad layout that shows one ad, it's one impression. If your ad layout shows 2, 3, 4 or 5 ads at a time in a single ad block, it's still one impression.
Just kidding.
Do you have some sort of advertising already? Chances are, you will be making more with adsense than anything else. This may be false, but it is the case with a large number of topics, so i would go with adsense.
Slap it on your pages and test it out for a month. I am sure you have traffic fluctuations on and off season, so this time of the year may be lower, but see how it works.