While I will comment you have a bargain or cheap router that takes a bite out of the speed you might boost it if you can install Openwrt in that router. Sadly it's not the cables.
Then again I wonder if you tried it with the WIFI disabled. I can't count the time I found moochers on the wifi.
I have a TW Roadrunner cable internet connection and average about 5000 kbps speeds (When the Computer is wired directly to the Modem).
I add a Netgear WGT624 router to connect a PS3 & Xbox and average about 2000 KBPS at my computer. I took these speeds when the game systems were turned off. I do not use the wireless option on this router.
This is more of a drop than expected. What type of Ethernet cables should I use? Will cat6 cables help? Should I upgrade my router?
Thanks in advanced