My final current challenge to add to my theological library is a set of books by Pannenberg.
His Systematic Theology
Jesus God and Man
Towards a Theology of Nature (that gives it away: the idea of 'nature' is not in any way Christian)
Basic Questions in Theology v. 1 and v. 2 (I read v. 1 at L'Abri)
Theology and the Kingdom of God
Theology and the Philosophy of Science
Faith and Reality.
Saving up...Amazon has some quite cheaply, but its the postage that kills me, exchange rate wise.