All the mesh system in Arris are best we have dual band and single unit router on mesh devices so you can choose accordingly. We would recommend W30 you can check the device details and specification on shop.surfboard.com

What size is your home? 

What speeds do you pay for (and receive)?

What’s your budget? 

What are you using it for? (gaming, streaming, etc)

The G34 is a cable modem + Wi-Fi router combo.  You can either put G34 in bridged mode to use as cable modem only and add Mesh System to provide Wi-Fi and network for your devices.  Or you can continue to use G34 as combo unit and add access points.  

Thanks to all. I just purchased Arris W30 on Amazon.