I live in FL so I know about having to use A\C year round.As you know people mention a brand and price but not model which will ultimately determine the total cost.I was in the exact same situation and due to the rusted coil tubing, and overall condition of the Air Handler decided for a total A\C replacement.Payne is considered "Builders Grade" lowest grade and some A\C guys argue not to install them because it reflects on their reputation when you have problems with the system.Look for the highest seer rated, quietest, best warranty HVAC that is fairly priced.The installer is a HUGE part of the HVAC's life span, along with your regular changing filters, cleaning coils when needed, cleaning drain lines and vacuuming dust out of the Air Handler Cabinet.

I hear about Vanguard frequently. 

Caught all the dirt and was haed to vacuum.2) Trendy colored.  

Are your repairs more frequent and more expensive than you have anticipated?

If you get at least a 16 seer the heat out put is very good.They come pre charged with freon but it is best to pull a vacuum on line before opening valve to release freon.

Although i haven't been as frequent as i would like to be here on BP, my desire and dedication to Real Estate Investing hasn't wavered.  

Vacant homes are frequently broken in to and attract squatters and unsavory characters.

OK so this is kind of a pet peeve of mine.I frequently see posts that say "I'm looking for _________ in __________."

To me that seems frequent enough for them to take notice to your mailings but not too frequent to where it would start getting really expensive.

Towels and wash cloths go missing, so I frequently have to buy more of those items.