@jky0422 

Your selection of these two Deco models to choose from is somewhat confusing. X50 Pro has 2.5 gigabit Ethernet ports, X60 has gigabit ports. If your wired home network is gigabit, you are overpaying for feature you won't be using with X50 Pro. If your wired home network is 2.5gigabit or faster, X60 won't be the right choice.

How about figuring what Deco model will work for your from larger selection of Deco models?

If you are OK with that approach, I'll need additional information from you:

1. What is the LAN speed of your home network: gigabit, faster? 

2. What is Internet speed you are getting from ISP?

3. Which floor Internet link will be on (ISP modem/router)? That might impact decision on which Deco model to choose.

4. Do you plan to connect Deco units with Ethernet cables or they will be connecting to each other wirelessly?

5. Do you have TV (coaxial) cables going between floors?

They can be used, with proper adapters, instead of Ethernet cables to pass Ethernet traffic between floors and link Deco units over wired link.

6. Can you place Deco unit in the middle of the floor?

Meaning, there is electric outlet, place for that unit, and if there are Ethernet/TV cables - they are also there.

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If some of my questions are not clear, feel free to ask for clarifications.

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Side note: you do realize that gaming over WiFi is going to be influenced by inherently unpredictable and fluctuating latency, right? That is true for regular WiFi router and could be amplified by WiFi mesh, where traffic could go over multiple WiFi mesh nodes.

Just making sure you have realistic expectations when it comes to gaming on device connected to WiFi mesh (any brand). I am not into computer games, but my friends who are all have their gaming PCs wired.

Another side note: for place like yours I would recommend to start with one Deco node per floor. Then, add more on each floor if coverage from one unit is insufficient. Which means, you are going to start with four Deco units. Mentioning that to make sure you have budget for that.