you have made your car to stiff.
hard stiff ride doesnt always give good handling, i cant see why people dont see this.
ok i got coil overs but they not set on rock ahrd.
hard stiff car is great for a nice smooth track, but some of the crap they sell although will geive better handling on road wont last very long as its designed for track use.

you say uprated arms, im betting zoo arms yeah, there good, but if you fit this type of stuff the ride is gunna be shit, end of