I am admittedly a huge fan of Lightroom. I bought it before I discovered this forum or the Lula site. I found it intuitive and easy to use and the print module blew me away, however I had no inclination of it's real power. Then one day I a clicked a link to some article on a site called LuLa. After I read the article I went to the home page, then the What's New page and I see this picture of Schewe & MR ( I had no idea who either one was BTW) and some thing about a tutorial on how to use LR2.
I looked at the free segment they had posted and took a chance and bought it, you might say the rest is history. After I viewed the entire tutorial I realized that I had been using only a small bit of Lightroom's powerful features. I then bought Camera to Print and became a hopeless Schewe-Reichmann Lula follower. Then came "Where The F*** are my pictures" I then realized that Schewe & Reichmann had a coconspirator in Seth Resnik to find ways to pry my wallet open. Seth laid out a clear case of DAM for me & it all came together. I had no idea that LR was a data base...Thanks to Seth & Mike I can now find every picture, when I need it.
So to the OP, I say learn all you can about how Lightroom works and I think in most cases you will not need to go to another editor unless you do a lot of compositing, stacking, cloning etc.. I do keep Photoshop handy, just in case in need to do some of that heavy duty cloning or touch up that LR cannot do, but I chiefly use it mostly for Panos & stacking macro shots.
C'mon Schewe where is that damn print book!