I ride Greenspeed GT3, which I purchased in June after just two afternoons of looking. I liked the Cattrike and the WW, which were a bit cheaper. The dealer steered me towards the Greenspeed by extolling its quality. The machine is wonderful. I would certainly give the Cattrike another look, but the WW no chain tubes and a somewhat convoluted chain route that I've read can be cause for concern. I'm unable to do my own repairs and the Greenspeed has proved dependable in a way that is necessary for me. Whether the other trikes would have required service or been less dependable, I cannot say.
I do think, however, given the inherent complexity of a tadpole tricycle's frontend and that they're all virtually custom built, spending an extra $800-1000 on getting what you're most comfortable with is money well spent.