im in a decent sized house where theres someone living in the basement & top floors (2 story)

im looking for a decent router that will provide signal from the main floor to everywhere throughout the house.

no idea what to really look for so i just google whats best. so far ive come with this: https://www.amazon.ca/gp/product/B01N08LPPP/ref=as_li_ss_tl?tag=comparaboo038-20&ascsubtag=485734573-312-1551907783.1511842760&SubscriptionId=AKIAJO7E5OLQ67NVPFZA

no idea if its decent or not. id rather not spend over $200 is possible

The netgear Nighthawk line is pretty good.

Any other ones that are special?

using a Asus RT-AC68U AC1900 Black Diamond

its around 120$ and goes through every kind of wall without any problems. im super happy since nearly 4 years.

Define "decent sized house". As in, how many square meters of finished space? I generally recommend one transmitter per every 150 square meters.

Starting off with the single-node Google WiFi might be a place to start, as you can add nodes as needed to grow the network.

https://www.amazon.ca/Google-Wifi-system-single-point/dp/B01MDJ0HVG/ref=sr_1_11?s=electronics&ie=UTF8&qid=1511911890&sr=1-11&keywords=linksys%2Bvelop&th=1