Couldn't agree more, they're a great thing to pick up, and as Llama points out, much much cheaper than they seem to go for on the secondary market.
Through a twist of fate, I ended up with a second Vok disk, which I got turned into a necklace.
Anyway...
I pre-ordered both Waspinators and both Rhinox's this morning. The Takara versions will no doubt live down in Tassie, next to Henkei Dinobot and Cheetor (and the rest of my collection), while the Hasbro versions will be with me here in Melbourne, so I can enjoy them.
Fingers crossed the paint apps turn out better however.