well based off my expirence with this So called LAG its very simple place your (custom built) PC into a lake, pond, sink, whatever destroys it go to your local WALMART and buy a laptop or desktop when you get home make sure to call your internet supplier (at&t,time warner, comcast) is prefered and ask them for a higher speed internet.
It works my trusty virus filled walmart laptop does not lag 1 bit on my high speed internet
it work with Time warner and it currently works with AT&T (i switched because AT&T was cheaper) i pay about 110 a month for 2 tvs dvr hbo showtime cinamax on demand with internet so lag problem solved