I need some advice on what software I should buy for editing digital photographs?

I'm not a professional; I have a Nikon D800 and shoot Raw. I don't shoot hundreds of pictures at a time. Cost is not particularly an issue, but don't want to waste money either.

Adobe Lightroom 4 is good for organizing pictures and editing RAW.
Or just Photoshop CS6 which uses Bridge for organization and Camera Raw for raw editing. There's somewhat of a learning curve for photoshop though.

I've been using the Gimp for years. It's practially identical to photoshop except that it's free and it doesn't have some of the little gadget-y tools you see advertised for photoshop. If I used photoshop I might be able to think of some examples. (lol) Gimp also has tons of excellent tutorials online.

http://www.gimp.org/....gimp.org/

If you can afford Photoshop and you plan on doing quite a lot of editing, that is without a doubt the best way to go.

Photoshop Elements does 90% of what full blown Photoshop CS6 does & will probably do all you'll ever need. Costs less than £100.