Rich,
You can download a demo version of Accordance before you buy. It is limited to a relatively few texts, but you can use it to get an idea of how powerful it is is. The demo can be found
here. There are also a number of online tutorials
here to help you use to program. The only aspect of Logos that is "better" than Accordance is that it does have more resources. However, Accordance continues to put out more and more resources. The Mac version of Logos is very limited compared to the PC version, so beware.