I need some help deciding on something

So I was looking at some cool mega construx sets and found the sets in the second picture. I need some help deciding on which on I should buy/save for the top 2 are about 100$ and the bottom 1 is 200$ and there’s only one seller of the bottom one. I was looking for a display/diorama set to put on my desk. If you have any better sets in mind tell me. Have a good day bye