I have 4 study bibles. ESV, NKJV, NRSV, NKJV Open Bible. This is my favourite. The reason I like it is because of the NKJV translation, but also because what you find in there is really useful. The ESV has better maps, and nice colourful pictures but I still go back to the NKJV. One of the best features are the word studies. These show the Hebrew / Greek word and it's translation and it's full meaning. For example, in 2 Thessalonians 2:3 the NKJV uses 'falling away' rather than 'rebellion' which many other versions use. The word study reveals the Greek word apostasia and explains the meaning in full. There are 350 of these word studies with Strongs reference and it's these that I find really useful. The concordance is also superb with 195 pages. There are also really useful articles spread throughout. You'll find these references just where you need them. I love the fact that for a study bible it's not too big either, so i'm more inclined to take it with me rather than just use it as a desk bible. I bought the black bonded leather version (soft back). I always recommend having a couple of study bibles in different translations to compare, but if I were going for just one, then I'd choose this one. If you're happy with the NKJV translation, then get this. If not, the ESV is also fantastic, but it's quite a bit larger and whilst it has lots of interesting information, I find the NKJV has what I'm really interested in.