Could use geek/user feedback on personal project idea - 2 alternate user interfaces

I'd like to solicit feedback from other geeks about a little home project I've been playing with and a couple different approaches to the UI/UX.

The basic project is a database browser, which loads the schema at start time and lets you navigate along the key links.In this case, I've set up a small library cluster schema that tracks books and holds on them by patrons.

Both UI ideas are coded using WPF (Windows Presentation Foundation) in C#. But I present the forward and backward links in a couple different ways and would like feedback about which looks better/cooler.

Look #1: the panes on the left and right are WebBrowser controls, with link info formatted up in simple HTML. I create a summary of available links and but that in a table on top; those links take you down to the table containing detailed links in the lower table. When you click on a link in the lower table, it navigates to that node in the center and that node's forward and backward links replace the previous ones.



Look #2: the basic function is the same except that the web browsers with their tables are replaced by pairs of list views. The lower listview is populated when you click a line in the top. You then press a Go button to do the navigation.



Thoughts? Comments? Ideas?