I wouldn’t say the translation is too important if you’re studying Catholicism to convert, as long as it’s an authorized Catholic Bible with all the necessary books. A Bible is a Bible, pretty much, and translation really comes down to a matter of personal preference. What’s important is you read it and understand it. If you have a copy of the Catechism of the Catholic Church, and a Catholic Bible of any appropriate translation, you should be all set.
For my own private study I personally like to have a Bible that has references to the CCC right in it. The Didache Bible is fantastic for this purpose and you can get it in NABRE and RSV/2CE versions. The Didache Bible also has a large number of apologetical explanations and some great indexes. When it comes to the New Testament, I also turn to my Ignatius Catholic Study Bible New Testament which is a RSV/2CE NT-only Bible containing many references to the CCC, extensive notes, many great topical essays, wonderful indexes, and a concise concordance I find myself turning to more often than I imagined I would. Oh yeah, and full color maps. An Ignatius Catholic Study Bible Old Testament is being worked on, and a great many Catholics are very eager to get their hands on it when it’s finally done.