This series of new translations of the church fathers is from a wide variety of different translators. Each volume has a substantive scholarly introduction to the author/work. These editions are not public domain like the Schaff set but modern, scholarly translations and this is a much better price than the hard backs. Still expensive as a set but you don't have to get them as a set. Just buy them individually like you do normal books... get them as you need them, which is what I do. Better yet, don't take my word for it, just get a single volume and dive into Eusebius, Jerome, Augustine or another church father and see what you think.