For me, 2.4 ghz has worked very, very well for penetrating pesky walls full of HVAC/washer/dryer/giant metal beams. I keep my office devices either plugged into

For me, 2.4 ghz has worked very, very well for penetrating pesky walls full of HVAC/washer/dryer/giant metal beams. I keep my office devices either plugged into ethernet or connected to 5 ghz where they're in clear view of my router. Especially if you're not right on top of other apartments or anything and don't require >500mbps download speeds, any decent router should serve you well on the 2.4 band.