steering wheel wobble.. Help

[grego37]

My front tires are 245/45/17 , Y rated, maximum performance level on tirerack.com, if you've seen these tires they're pretty serious for a street tire, nice big blocks.

I had them "match balanced" this last time at Americas tire.
They position a certain partof the wheel with a certain part if the tire for best possible balance. I even told them not to worry about putting the weights just on the inside (for appearance).
To put weights in the best possible spot for best balance . Ended up with a little on the outside and some on the inside.
I've been there so often they're beginning to know me by name.
And at 20.00 a pop it's starting to get expensive.

Over the weekend I put my brothers wheels/tires on to try to rule out my wheels/tires.
I did definately wobble less , but his tires are much thinner and less aggressive. I really dont think it's my Wheel/tire combo.

Next I'll try:
1) My wheel/tire combo on my brothers car
2) Adjusting the slight play out of my rack and pinion (1/2" at steering wheel)
3) Balancing my wheel/tire combo while on the car.

Any other suggestions are greatly appreciated
thanks.