Congrats on your purchase
I also have the adobe master collection with CS4 that cost about £1500
There is little you cant do on Capture NX2 that you can on CS4. Its seriously rare I ever use CS4 now.
To put things into perspective, I only use CS4 when I use My Pentax K5, since Capture NX wont reconise DNG files, which is a shame.
Capture NX produces far better JPGs than CS4 as well. So much so, that, I go through the trouble of turning the Pentax files into tiff images
and producing and finnishing them in Capture NX2. This is no surprise, since Nikon develop Capture NX2 for there own cameras.
To put things into even more perspective, Capture NX2 is so good, it plays quite a big role in my staying with nikon.
If you have any problems with it, drop me a line. Although it also comes with a very good easy to understand and well writen instruction manual.