Content is certainly a big factor for Google and the more fresh unique content the better but links and general seo is probably even more important. You should try and do both though, 10-15 pages is not really that much content. You should always try and put yourself in the mindset of the visitor too your site so in that case more good content is certainly a fine thing, it’s certainly something I would look for myself in any website. A banner farm website would probably put me off to be honest.