I have a 440 QE, and I use Schmetz needles (sharps, not universal). I did buy some Bernina needles at a class once, because I broke my last needle, but I couldn't tell any difference. I have considered using Organ needles, because I have heard good things about them. With needles, it's not the machine, but the size of the thread that matters.
I do, however, use only Bernina bobbins. I'm pretty sure that Bernina bobbins are not interchangeable with other brands. Even with Singer machines, you can't use the Class 15 or 66 in a 221 Featherweight.