I put cross drilled rotors on the front and they have worked great for me. The only problem is when I am leaving the driveway and the first time i hit the brakes at the end of the driveway while they are cold they dont seem to grab very good, but after that they are fine and stop my 35s without trouble.

You can adjust the load proportioning valve on the rear axle upwards to force the rear brakes to engage more often, this would help you stop.

Shuddering front end while braking is definately warped rotors.

96 T100 4x4 - 35's, 4" SL, 2" BL, 4.88s, ARBs, custom bumper & E9000 winch, etc.
99 F-350 4x4 superduty supercab turbodiesel longbed