The simple fact there is no real standard for "N " routers much that most people think there is and many new devices including the iPad and other tablets, phones plus gaming machines sometimes do not connect or connect and drop off without warning. The other issue is the security set up again it can cause problems I have replaced my clients routers and my own whom had problems with a N 600 or N300 net gear and all works great. In most cases the older modems worked fine with computers but in saying that we also found a couple ASUS new models were intermittent on Belkin modems 1 year old.
With security on a net gear modem routers/ routers, the recommended setting in *security options is wpa-ask+wpa2-psk.
The router i recommend is netgear N600 Wireless Dual Band Gigabit Router
And modem router. Netgear N300 WIRELESS ADSL +2 MODEM ROUTER
The above give fast performance which suits gaming as well as general downloads.
I do not recommend buying just any brand based on price as you will regret it in the long run. I totally understand there are other excellent brands available but understand where I am coming from is if it works all the time why rock the boat stay with what works.