~~~Agree to disagree or "agreeing to disagree" is a phrase in English referring to the resolution of a conflict (usually a debate or quarrel) whereby all parties tolerate but do not accept the opposing position(s). It generally occurs when all sides recognise that further conflict is unnecessary, ineffective or otherwise undesirable. They may also remain on amicable terms while continuing to disagree. ~ http://en.wikipedia.org/wiki/Agree_to_disagree
on amicable terms = on good terms.