My first Dyson was a DC04 too -great cleaners- I kept it until quite recently and have tried pretty much most of the range now.
I always meant to buy a Goblin Topo too while they where still available. What is it like to use? Could imagine it being useful for hard floors and smaller jobs. Yours looks like new!
The Goblin is at our caravan which we go to 3-4 times a year so you can imagine it doesn't get used lots. Got the box and everything! It has decent power for a bagged cylinder, and not too loud either!
I tend to use the DC04 the most but my collection lives in the garage and it really depends what I can get to! Near the door is the DC03 so I use that because i'm not delving in the garage at this time of year!