ᐅ Which heating system? Requesting recommendations

Hello,
we are planning a prefabricated house with 140 m² (1,507 sq ft) of living space and are still unsure which heating system to choose.
The house will be built in the Ulm area on a slab-on-grade foundation. Therefore, only a relatively small utility room is available.
We are moving away from the ground source heat pump because we have read quite a lot of negative things about it.
What are your experiences? Also regarding the price?

Well, I am still in favor of a gas condensing boiler and nothing else...

I think there is a lack of information. Otherwise, an air-to-water heat pump is comparable in cost and comfort to a gas condensing boiler, especially if you can do without the money pit of solar thermal systems, depending on the building design.

Yes, it has to match the rest of the house and the user's preferences... but still, without much hesitation, I would choose a gas condensing boiler again instead of an air heat pump / air-to-water heat pump.

I would choose a heat pump again; by the way, I previously had a gas condensing boiler, so I am familiar with both ;p. I almost went with gas because I wanted to cook with it as well, but my city basically decided against installing the gas line afterwards. Now I don’t regret it, neither for heating nor for cooking with induction (although gas would actually be cheaper for cooking).

In terms of space requirements, there is not much difference between the two solutions.

We are also building a prefabricated house of approximately 140m² (1,500 sq ft).
After much consideration, we have decided on the Stiebel Eltron LWZ 504 (air-to-water heat pump + mechanical ventilation with heat recovery).
We were initially offered the Nibe 750, but we quickly dismissed that option.