I’d stick with Amazon if I were you. All of my Amazon sites only have Amazon affiliate links. If you use Google Adsense display ads on your site, you’re literally taking people away from your site for the sake of just a few cents with these type of ads. If you direct them just to Amazon, then you have a greater chance of earning more money from that click.
This is how you turn visitors into buyers into raving fans. If anyone is serious about "making it" in affiliate marketing, or simply making any semblance of money online, they have to adhere to this single principle. The better you get at creating an emotional attachment during each stage of your funnel, the more likely you'll be to succeed and even to get rich through your efforts.