I like my Berninas. (730e and 440qe) I have an old antique treadle in the garage that I should get working again. I also have a very old Singer Futura (not the embroidery machine - much older than that).
I still sew on the Bernina Record mechanical that I inherited from my mother. It is a dream to sew on but I have got used to the needle down position and there is none of that on the Record. :)
I have used other machines at shows and workshops where machines were supplied and I don't think I would mind purchasing other makes but it just makes more sense to order the same brand. I don't think I will be buying the Bernina 830 though I have hinted big time but no notice is taken ;)