Maybe a few choices for you, each have: Xtreme N, Gigabit, Wireless, Broadband Router . Some take it further with dual bands that operate at the same time.
Newegg can be your new best friend with plenty of choices, or any other reputable vender.
The D-Link DIR-655 doesn't have dual bands, but it does "give voice, gaming, or media streaming priority over other data. The DIR-655 has integrated Intelligent QoS (quality of service) technology to do just that. The DIR-655 got pretty good reviews@ Newegg.
The router analyzes wired and wireless traffic and separates it into multiple data streams. These streams are prioritized by sensitivity to delay, so applications like VoIP (voice over Internet protocol), video and music streaming and online gaming are given priority over Web browsing."
I have used the Dual band D-Link DIR-825, for about 3yrs. now. No problems. I piggyback it off my Verizon Fios POS wireless router, but they are hard wired.
We mostly game and stream a little from Netflix on a Blu-ray.Never any lag.