>>10096586>>10096575>>10096441What you need to work out is what you want. If you want something modern, a modular and a city display (even if it's just that 1 modular) is probably the way to go.
If you love fantasy shit and want to actually play with your Lego, the castle is top notch. Maybe consider the Blacksmith set too which is about half the price of the castle while having roughly the same sort of footprint and design as one of the Modular sets.
If you want scifi, or you're not specifically tied to wanting a building, do what
>>10096490 suggested and cop the Galaxy Explorer