The biggest difference between the Clavinovas and the other digitals in the Yamaha line (PF500/1000, stage pianos etc.) are:
- Furniture cases
- Built-in sound system
- Better action (at least in the higher end models)
- More instruments and voices (usually) and larger samples for some of them, particularly the pianos
If you're going for the Clavinova line, they come in two flavors. The CLP models are basically "pianos with a few other instruments and features" The CVPs are "pianos with zillions of bells and whistles for auto-accompaniment, midi playback and recording, etc. etc." I think the CVPs are the only ones with the guide lights your daughter liked.
If you go the CLP route, I'd look at the top of the line CLP170 or 175. It has the "natural" (wooden keys, different mechanism) that I think is better than the others (my CVP900 has it) and it has the augmented sound system that many seem to like.
With the CVP, as you move up the line you get better sound systems, better piano sounds, and more instruments. Most of the bells and whistles stay the same once you get to the 206 level and beyond. Be aware that Yamaha has announced the CVP300 series, which means the 200 series will be replaced. You might get a good deal on a 200 series because of it. The PF500/1000 offer many of the features of the CVPs, but not all, and they are closer to a stage piano "look" than the Clavinovas.
One very good reason for going with Yamaha is an excellent user group (non-affiliated) at www.cvpug.com.
If you go there you can search the archives for just about anything you want to learn, and if it isn't there, many users are happy to answer questions. I don't think any other digital maker has such a group.
And NEVER NEVER pay list price for these things! 20%-25% off list should be easily obtainable. There is an excellent dealer in Canada who will ship to the U.S. and has very good prices - search the user group site for their name. I bought mine locally because I sort of wanted to support local dealers, but I used the Canadian price as a benchmark to get my local guy to come down to something reasonable.
As somebody who has and enjoys both digital and acoustic instruments, I think you're making the right choice for your daughter.