The ESV Study Bible is now available for purchase online. It hit the stores on Wednesday, but you can pre-order it from the link above. I've been using this translation since it was first published in 2001. It's very readable, literal, and has taken advantage of many of the advances that the translators of the KJV desired to see so that their work of improvement on previous English translations would be still further improved. You can read from this version here.
Go check out this Study Bible - there are tons of resources available in it (check out the Blog section of the Study Bible site for many of these). I plan on getting one soon (probably for Christmas). Along with the resources available in the Bible, everything will also be available online at no additional cost if you own a copy of the Study Bible. Here is a video demonstrating some of the features: