Help in choosing equipment

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Hello. My internet contract ends in May. I currently have a netbox offer with a zte mf258k router. In general, I am quite satisfied with the Internet, although I know that more could be learned from it. As play does not offer anything new when it comes to equipment, I would like to buy a router privately and from play take only a 500gb internet contract without the device. My location is 53.976328,17.766422. Due to the fact that I have a few kilometers to BTS, an external antenna is rather unavoidable.

My current signal parameters are listed below:
https://ibb.co/3M5VD0W

Currently, download during peak hours oscillates around 20-30 Mb / s.

Can anyone recommend a router that would be best for my situation? I also have a cybertech panel antenna that used to work with the b525 router, maybe it can be used with new equipment? Thanks in advance for any help. If additional information is needed, I will gladly provide it.

[You must]

I was wondering about the b628-350+panel antenna that I have or another? What do you think about it?

[You must]

I was wondering about the b628-350+panel antenna that I have or another? What do you think about it?

Below is a screenshot from netmonster from the place where the mf258k antenna was mounted. What I noticed is that sometimes "5G" pops up on my phone, but it's probably not worth bothering about?
https://ibb.co/8s7shr0