I recently bought a new couch and loveseat. I am getting rid of my old couch and keeping my loveseat. My new furniture is green an beige so I am going to get a couch cover for the original love seat to match the new and I am going to paint my walls with a hint of beige and buy new curtians as well. it will really give me a completely new look to my living room. Plus I am going to declutter my shelves and curios. I will take before and after pitcures and show you when I am done. Now be patient it will take a while because I do have a little one in the house I will have to work around.
It sounds like it will look very nice. I like the colors you have chosen and they are "in" right now. If you are painting the walls beige maybe you can incorporate the green in the new curtains and maybe some throw rugs. I have children myself and know how hard it can be to paint and redecorate with little ones about. Just take your time and I am sure it will be beautiful when you are finished.
I plan on getting green curtians to tie into the new furniture. I don't really like throw rugs though the slide to much on the wood floors. I but I am really excited about getting started and I can't wait until its all done to have a fresh new look to my living room.