Choosing a platform for Biblical Studies software can be tricky, inasmuch as trying things out for yourself is probably the best mechanism for finding what will work for you. But, obviously, you want to do that trying out before you commit to one of the options. This process is now a bit simpler with Logos 7 Basic, which is available for free.
HT: Tyler Smith. For available trial versions of other Biblical Studies software, including Logos, see Trial versions of Biblical Studies software.