I currently have a Fox setup and am able to use the CobraIII deep lip on the same setup you have.
I originally bought the Medium lip for the fronts and was not able to mount them because of interference with the upper ball joint.
With the deep lip I have about 1/4 inch of clearance.The advise to go to SN95 is good ,for all the mentioned benefits plus ,if you want to use the Hallibrand "Spinners"it makes it a snap.With the Fox setup you will have to do some machining to make them work,there isn't enough room around the dust cap area unless you use spacers and use longer wheel studs.
This topic was discussed a few weeks back ,you may want to look it up.
Lexus Blue/silver stripes,351W,GT40EFI,3.55TL IRS,TKO mid-shift,F&R sway bars,carbon fiber dash w/ autometers,first start 12/24/06! Levy's KONIS all around,Graduated 2/15/09,still stuff to do