RWHeatingAndAirConditioning.com - What is the best brand of central heating and air conditioning?

What is the best brand of central heating and air conditioning?

To be installed on roof of house.

Not Trane, Carrier, or Bryant. I am a HVAC tech and these brands have far too many parts that routinely go bad. I recommend Ruud or Heil.
for central heating .. Worcester brand boilers are best .. and for air conditioning Mitsubishi brand is good
Stay away from Janitrol. "Junkitrol" as it is commonly referred to only last between 5-10 years. I know this from personal experience.
ruud is good equipment and rheem is better....there both made by rheem and ruud is the off brand....when you shop around compare warren ties and SEER ratings.....a 13 SEER weatherking will be cheaper than a 15 SEER rheem but it wont have any warranty and is less efficient