I would suggest Pro Performance!
Give us a call and we can go over your options as for lowering your suburban. You might be able to use the Hotchkis 4" drop coil up front, which will get you down pretty low in front.
If I may ask, how come you want to avoid a drop spindle in front? Is it due to budget? Only because, the drop spindle will be the best way without sacrificing ride quality and your front end geometry.