IMHO, and I don’t know your budget nor where you are in the process, but from my research, geothermal HVAC with a desuperheater for domestic hot water is the ultimate. I checked out WaterFurnace since they are based in my state; they would put a couple hundred feet of PEX in the ground for the heat sink, and this handles heating and A/C. Rather than paying for electric furnace or gas/propane plus electric fans, a geo system only requires electricity to run the pump and compressor, so essentially a heat pump system.
The piping in the ground has a 100-year warranty; the “furnace” has a 12 year warranty but there are plenty of anecdotes on the net that show these are easily lasting 20+ years with minimal parts failures, and in the south the system will likely supply 100% of hot water and maybe 70-80% in the winter, for nearly free. To me, the biggest benefit of this is the system is simply transferring energy back and forth, rather than consuming it. Electric & gas heat both eat large amounts of energy to transfer heat & cold to air (a notoriously good insulator), where geo uses water to transfer heat. Overall running costs are lower, but offset by higher initial costs.
My quote prior to CV was about $22k to replace furnace, AC, and HW with the geo; since ‘22 that quote ballooned to nearly $32k. If I had done the system in ‘20, payback vs my current propane would have been about 4-5 years; now it’s about 8. But after the 8 years until the end of life of the system, savings vs propane would be roughly ~$200/mo, even at current prices. Propane is only going to get more expensive; you could realistically add a medium-sized solar array and completely power the geo system.
Just my .02, hope this helps!