Should explain that I've been using LightRoom as my primary editing software for some time with no complaint regards to speed or function. Only recently when I decided to try major change in exposure levels have I not liked the way it processes images. In reality, that isn't a regular usage of any image editing software. When I picked up 5D3 I've been forced into importing using other software as the files aren't supported yet. So to use it with raw files in the meantime, I've needed to import using DPP, convert to tiff, import again into LR so the catalogue can see it and finally start processing. The catalogue of LR is causing me the extra import stage on a temporary basis only, otherwise the search and filtering capabilities that it possesses are really nice to work with. Just get in the habit of importing images with LR to avoid the extra step. All of the other editing software I've used can see the files imported by LR.

Occasionally, I do export images to PhotoShop for editing capabilities beyond LR, but with improvements to capability with every new release that is happening less and less often. Photoshop did have better softproofing and has better plugins for my printer, but new version of LR has closed the gap somewhat. I haven't done any printing with the new version as of yet, but playing with the print module seemed improved over LR3.

Bang for the buck, LightRoom still wins my vote now that I've had more time to mull things over and move on. Its easy to learn your way around and it has pretty much all of the functionality that most people need. Can't remember offhand if the new version has perspective correction (keystoning) but if it doesn't RawTherapee does.