I've tried to read prev. posts..

I believe I have a good installer. They offer Trane and Amana. They
push Trane (prolly good discounts from Trane).

A 3 ton, 11 SEER Trane (XR11) is $2880 installed
A 3 ton, 11 SEER Amana (Prestige) is $2740 installed

I have a Coleman EVCON furnace (in a frame home.. I've heard that this
is unusual).