A few more words about the DCTV:
An RGB adaptor is nice, but not absolutely neccessary. The quality of the composite output is amazing--much better than the normal mono composite out of an A2000 and much much better than the color composite out of the A2300 genlock. The DCTV has a really saturated color output which is really apealing for graphics, animation and games. It is more intensely colored than real life for sure. I love DCTV paint. I personally find it's compsite out on a modern LCD monitor much better than the RGB out of an Amiga on a 1084 monitor.
And of the 3 DCTVs I own, the most expensive one was $24--package deal with a DigiView gold digitizer as well. The cheapest was around $5 or $6. This is one of the real bargains in Amiga hardware.