ESV is okay, but it uses the Masoretic text for the Old Testament. The Orthodox Study Bible and Douay Rheims Bible both use the Greek Old Testament (Septuagint). The Douay Rheims is a bit harder to read, but from what I can tell has a more accurate translation. Not sure how the Orthodox Study Bible is with regard to readability.

Stone Choir is in the midst of a multi episode series arguing that the Old Testament was originally written in Greek. Very fascinating stuff if you're curious.