PVT system and brine-water heat pump experiences?

Hello everyone,

we want to build a single-family house with about 130-140 sqm (1.5 floors, roof east-west, 4 people). A photovoltaic system should be installed on the roof and a heat pump should provide hot water and heating (underfloor heating or heating/cooling ceiling). A fireplace for "watching the fire" should also be included.
I am currently considering various options:
1. only photovoltaic + air/water heat pump
2. PVT panel + brine/water heat pump directly
3. only photovoltaic + solar absorber + ice storage + brine/water heat pump
I understand that the costs vary greatly here. Since I believe that we will increasingly need "cooling" in summer in the future, option 3 would be my favorite.
Do you have any other ideas or experiences with the components? Fireplace simple or water-bearing? Cooling ceiling or underfloor heating?
Looking forward to feedback.

Of course, it also depends somewhat on the insulation standard, etc., but basically, Variant 1 is a good choice. It is inexpensive, flexible, proven; 2 and 3 sound very experimental. For cooling, better to use a normal air-to-air heat pump (air conditioner).

Best not to have a fireplace at all in a new building.