What is the best card to supplement AMEX Explorer?

I have decided to get an AMEX Explorer which I have assessed best suits my needs. The only thing is AMEX is not accepted everywhere. I will be using it for the bulk of my transactions. Is there a suggestion for a supplementary card with rewards, that doesn’t have a big limit or large annual fee to support my points earning food the Amex Explorer.

Hi gazza1984

Unfortunately this website cannot make credit card recommendations. Perhaps this link may be of some assistance.