I prefer my 135i over the tii too, doesn't mean I don't like both though.
I run all the upgrades minus chassis reinforcement and stage 2/3 engine tuning. I use a mid range turbo. I limited the hp to I think 493 or something like that, I can't remember.
My suspension is
-5, -15 ------------------- 2.7, .7
10.6, 6.6 ------------------ -.15, .00
4, 5
5, 4
1, 2
dif is 5/60/60
fully customizable trans and I think mine is at 162 for top speed
brakes are 3/7
I use a G27 so I don't know how this would transfer over to a DS3 if that's what you have. It's not perfect since there's a good amount of understeer unless you're at a pretty high angle.