'Religion, the fear of God, must therefore be the element which inspires and animates all theological investigation. That must be the pulsebeat of the science. A theologian is a person who makes bold to speak about God because he speaks out of God and through God. To profess theology is to do a holy work. It is a priestly ministration in the temple of the Lord. It is itself a service of worship, a consecration of mind and heart in honour of his name.' (From Bavinck's Inaugural Address as Professor of Systematic Theology in the Free University of Amsterdam).
I have heard so many good things about Bavinck's multi-volume Reformed Dogmatics, which is now being made available in English translation. I will have to invest in the set sometime soon. See here for an excellent website devoted to the Dutch theologian and here for an interview with Dr. Ron Gleason, the site's author.