Gimp is great as a free tool.
Not a big fan of Adobe's new licencing model, I'd rather pay for a copy and be allowed to use it as long as I find it useful.
Lightroom is still handy for things like HDR shots. But, for my money I'll stick with Corel's Paintshop Pro, an ill named photo editor that will run scripts, macros, batch process and, plug-ins quickly and intuitively, has tutorials out the wazoo and is substantially less expensive than Photoshop but, not as inexpensive as GIMP.