I've had them all, except the Pfaff. First, I don't think you will get a machine of the same quality as your 20 year old one. No matter what you buy. They just don't make them that way any more.
My current favorite machine ( and I've had many favorites ) is a Bernina 820. I have an old Janome dedicated embroidery machine to make my labels, so wasn't interested in the 830. I traded in 3 machines (and it was still too expensive ) but damn, it is good. The new machines have so many conveniences that make sewing easier. Bernina gives excellent instruction classes and work books. . . at least my dealer does.
Get the best you can afford and try them all. Good luck.