What settings/configs do you guys use?

My system specs are as follows
Amd phenom ii 830 2.8ghz
Nvidia gtx660 ti
12gb 1600mhz ram

I get great preformance out of other games but tf2 is a bitch and fps goes everywhere. I've tried chris's fps config (as well as the tf2mate one) and it helped with my old gpu, but now during gameplay its at only 30% so I don't feel I need it anymore. I'm sure there are some console commands or conpetitive cfgs that I don't know about that will make it better. Of course the cpu will bottleneck in more demanding games like crysis but it should be ok with tf2 right?

I've been watching peoples streams on twitch (eg http://www.twitch.tv/mangachu_/c/1967612) and they are incredibly smooth and good looking.

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Actually while I'm on the topic, I need some help with scripts as well. I installed a medic autoheal script but it forces me to take the beam off and stop healing before I switch targets which is absolutely stupid when I could just do that without the script. Could anyone link me to a good medic script for that? I'd really appreciate it.