Uninterruptible Power Supply (UPS) recommendations and advice

Hello everyone,

I usually do my own research, and then I try to find multiple matching results and afterwards, read specifically in detail about each recommendation, but, I have to be honest that for UPS recommendations that I’ve seen, it seems to be a very personal recommendation depending on the wattage and connected devices.

First of all, most people recommend CyberPower or APC, but I’ve also seen some recommendations for Eaton. Is there any other brand that I should be looking into?

The devices I would like to connect to a UPS would be: desktop, TV, Apple TV, NAS, router and probably my Nintendo Switch.

There are some general things I've found out while searching that I think I would like some confirmation:

• I actually think I should buy two UPS's, or? I think just one for the desktop and another one just for the remaining devices, since the desktop uses a lot more wattage.
• Pure Sine Wave: It does not matter for smaller stuff (routers, etc) but it seems that anything above 70 W, it should use a UPS with this. So, that would mean I need pure sine wave, since my desktop and TV definitely use more than 70 W of power.
• Some people said to search for a UPS with line conditioning so that you always get a perfect sine wave. Would you agree?
• USB connection (not a faux USB!) so that the NAS detects the power failure and shuts down gracefully.
• It is important that the UPS has removable battery for better longevity.

How would I choose a UPS? Do I need to see the total wattage of all my devices and then pick the UPS accordingly? Anything I'm missing?

My budget would be up to €100 or €150 in case it is really worth it.

Thank you in advance for all replies.