The best systems in my opinion are in order Mitsubishi is probably the most reliable, Quite and efficient the drawback is heat pump only, Trane XV18 or XV20 pretty much Mitsubishi technology since Mitsubishi technology and Trane USA combined and formed the new company METUS but are pricy I personally have not had any major issues with them, and for the best entry level system Rheem/Ruud are very good systems. Only buy a Lennox if you want a new friend the repair man, not to mention that Lennox lied about the efficiency of their systems and the department of energy got involved and made the entire industry change the efficiency ratings last year.
FYI Trane is a extremely liberal company that really don't care about their customers they I have had to wait weeks for parts that failed on new systems not the XVs though.
FYI Trane is a extremely liberal company that really don't care about their customers they I have had to wait weeks for parts that failed on new systems not the XVs though.