I have an AT&T standard router and the internet speed sucks. Will a new router help?

[PlexQuake]

I have decent internet with multiple TVs, phones, and computers connected to it. Will getting a better router help the speed by a lot or will it do nothing. If it helps the speed, then what router is the best that is under $300. Please help me.

 

[scout_03]

alll the device use the bandwith so even if you get a new router that wont help .