You shouldn't be gaming on wireless in the first place and by no means remove your less than stellar router from the setup, but instead switch it to AP mode and connect it to a more favorable hardware. It eats a port and you compensate that by using a switch. It's an upfront expense only and it takes knowledge to be done right. The consumer grade hardware will never last a decade like my Pentium 4 equivalent
VIA EPIA-V MINI-ITX box has. The consumer grade software is riddled with security holes while
pfSense and others get routine updates. The magnitude of features are awesome too. Our family, including extended members, have an micro cloud network setup (5 homes connected via
IPSec but
OpenVPN works too) and share downloads and online services such as
Netflix via tunneling. Also used for mobile security because you can never trust hotspot access. You also get good
QoS and gaming never suffers from congestion because of Queuing topologies like HFSC.
I paid a fair amount before and I regret doing so. I began with the staple
Linksys WRT54G x2 many moons ago $100-150 x2, moved onto a
D-Link DIR 615 $100-150, and then I thought I found a savior in
Buffalo Tech with a
WZR-HP G300NH w/
DD-WRT pre-installed $100-150. Total: $400-600, 2002-2009
My current setup includes the above
Buffalo (AP Mode) $100-150, freebie
VIA EPIA-V MINI-ITX from work $0, 2-port Intel Gigabit NIC $20 (eBay), and a unmanaged Cisco 16 Gigabit Port Switch from a government auction $10. It's been running smooth for over half a decade. Total: $100-180, 2009-present
I've been connected to the internet since the early 90's and experienced every leap since the giant 14.4k modem that still liter our basement. Networking is difficult and will never be plug-n-play.
EDIT: And I misread everything you wrote :P