Your blogger received his copy of the Gregorian Missal today.
Review at Cantemus Domino, Another Review, where to buy - got mine on ebay though
The one thing that leapt at me was this - the Entrance, Offertory and Communion Antiphons all come from Scripture. What could be better than singing Scripture? Do we think that a hymn of our arbitrary choice can be better than that?
Sad to say, the anglophones do not have an official translation of the Offertory Antiphons. In the context of the General Instruction of the Roman Missal, the "Thanksgiving Hymn" is optional - your blogger would rather pray in silence. Similarly, there is no such thing as a "Recessional Hymn".However, your blogger would gladly recite/sing/chant the Salve Regina anytime.