check out the TP-Link deco range, gets a good write-up.
You can also check out ASUS offerings, also well-reviewed.
Think about your requirements.. size of house, how thick the walls are, how many devices you'll have connected, how fast you want the connection to be in various parts of the house etc...
prices start at about £130 and go up to several hundred..
tri-band is more expensive than dual-band as it includes a dedicated radio for backhaul.. but as a result, it's generally a little quicker overall than a dual-band system.. do you want the latest wifi6 standard for future-proofing or are you happy with AC?