I have TWO Designer 1 emb. machines, and wouldn't part with them, even if I upgrade to the Diamond.
You are referring to Husky, I think those are the sergers, could be wrong, but love my "Vikings", and wouldn't even dream of another brand. However those new Babylock's really look nice too! Depends on what you plan on sewing with them.
I would be leary of a "floor model". They are given some rough treatment, and I have seen children poking and pulling on them, out of "time" and you have a problem right from the beginning. Go to a good dealer, so they will back it up, if something goes wrong.