Time for a new furnace

SparkyInCanadaEh

It's time for a new furnace and I have 3 guys quoting
1 Luxaire
2 Keep-rite
3 American Standard

Luxaire and Keep-rite, as I understand, are both sub-standard crap. Wereas the American Standard is pretty good. Is this accurate? What sort of warranty should I expect and any other factors to explore?
p.s. I am looking only at two stage systems.

Thanks in advance for your help

concretemasonry

Make sure you get a variable speed fan (D.C.).

It will give you added economy and allow a lower temperature setting because of the unifirmity. - When heating, I run it constantly and you never hear it or notice the subtle air movement without drafts.

SparkyInCanadaEh

I am aware of the DC Motor although in my experience they tend to be very expensive (around $1000) to replace. The benefit as I understand it is the decreased power consumption. A calculator I found online estimates a savings of up to $300 per year in electriciy costs. It's just hard to justify an additional $1200 upfront.