So from the info in this thread, for anybody who is considering buying a NGCD:
Pros
Cheaper console and games
Plays burned discs without modification
Better RGB output compared to some AES systems
Some exclusive titles
Many games have arranged soundtracks
Some games have extra content, eg 5th course in Neo Turf Masters
Cons
Loading times (especially on later fighters, some unplayable)
Less titles
Some differences in complex games, eg smaller sprites or missing backgrounds
So I think this pretty much proves there are pros and cons to owning any Neo Geo system, and saying the AES/MVS is better across the board is simply not true.