From what I can see, an RSV seems to be the thing to get in English. I still have an old RSV from my undergraduate days. It was the text book in a course I took.
Hopko quotes from the RSV and KJV in his podcasts. I think the lesson there is to look in various places and to never stop searching the scriptures. That realization was a blessing to me.
Hopko rocks. His podcasts are very useful, to me at least. How that guy throws in Greek, Slavonic, etc seems effortless. Very cool.
Right now I like both the NOAB RSV expanded edition and the OSB. For me, both work. For example the OSB gives better LXX references to some texts. Note the difference in these texts shown below. The OSB is not only NKJV. It has a translation of the LXX similar to the one given below, and the RSV does not. It all depends on what you want to see.
There is also an RSV Second Catholic Edition as well that does not seem bad. I have not looked at that one much, yet.
RSV Esther 1:1 In the days of Ahasuerus, the Ahasuerus who reigned from India to Ethiopia over one hundred and twenty-seven provinces,
NKJ Esther 1:1 Now it came to pass in the days of Ahasuerus (this was the Ahasuerus who reigned over one hundred and twenty-seven provinces, from India to Ethiopia),
LXA Esther 1:1 In the second year of the reign of Artaxerxes the great king, on the first day of Nisan, Mardochaeus the son of Jarius, the son of Semeias, the son of Cisaus, of the tribe of Benjamine, a Jew dwelling in the city Susa, a great man, serving in the king's palace, saw a vision. Now he was of the captivity which Nabuchodonosor king of Babylon had carried captive from Jerusalem, with Jachonias the king of Judea. And this was his dream: Behold, voices and a noise, thunders and earthquake, tumult upon the earth. And, behold, two great serpents came forth, both ready for conflict, and there came from them a great voice, and by their voice every nation was prepared for battle, even to fight against the nation of the just. And, behold, a day of darkness and blackness, tribulation and anguish, affection and tumult upon the earth. And all the righteous nation was troubled, fearing their own afflictions; and they prepared to die, and cried to God: and from their cry there came as it were a great river from a little fountain , even much water. And light and the sun arose, and the lowly were exalted, and devoured the honorable. And Mardochaeus who had seen this vision and what God desired to do, having awoke, kept it in his heart, and desired by all means to interpret it, even till night. And Mardochaeus rested quiet in the palace with Gabatha and Tharrha the king's two chamberlains, eunuchs who guarded the palace. And he heard their reasoning and searched out their plans, and learnt that they were preparing to lay hands on king Artaxerxes: and he informed the king concerning them. And the king examined the two chamberlains, and they confessed, and were executed. And the king wrote these things for a memorial: also Mardochaeus wrote concerning these matters. And the king commanded Mardochaeus to attend in the palace, and gave gifts for this service. And Aman the son of Amadathes the Bugean was honourable in the sight of the king, and he endeavored to hurt Mardochaeus and his people, because of the two chamberlains of the king. And it came to pass after these things in the days of Artaxerxes, --(this Artaxerxes ruled over a hundred and twenty-seven provinces from India)--