In the context of recent discussion, readers might want to check out Patrick Henry Reardon's Christ in the Psalms (Conciliar Press).  Reardon, an Orthodox priest, has done a great job of producing a thoughtful, devotional, Christological reading of the Psalter.  The underlying text/numbering is that of the Septuagint (so there are 151 Psalms, and the numbering of the 150 is out of synch with, say, the NIV and ESV) but the work is well worth a read.

Here's a quotation from the intro: