I don't know how many Cambridges there are, but besides the original one in England, there's one in New England (Massachusetts).
So you have Cambridge Audio in England and Cambridge Soundworks in the US.
I'm with Tim on not spending a lot on monitors for a home project studio. I'm still using Event 20/20s that I've had for 10-12 years. Took me quite a while to learn how they translate, but they're pretty honest and very comfortable to listen to -- no ear fatigue even after hours at high volume.
If I were in the market for cheap monitors today, I'd check out Yamaha HS50M. There's a thread around here somewhere on them.