I can't tell if you're upset, and if those messages are in vain. The truth is, all of the posters just put their two cents in, which is exactly what you asked for them to do. I know for a fact that there are some $400-600 gaming builds that are floating around these forums (though I am no expert on these). If you want to add a $250 GPU to a system, then the system should be able to handle it. You could get a less powerful GPU for less money and probably experience the same results as the 660 ti (because of said bottleneck).
Posters weren't bashing your rig, they were just putting their opinion in.
Best of luck!
not offended at all , i cant see how you came up with that , also , my PC is hardly worth calling a rig .