Slightly different here but I ended up with Ridetech coilovers. Roughly 3" drop with stock spindles, but you have to use their Strong Arms. Overall excellent quality and support, great warranty, and they have different valving options if they are too stiff or soft for you. They ride really, really well; definitely biased more towards that than feeling like a race car. I have their coilovers in the rear as well, but with no springs - just running leaf springs. I went with a higher spring rate than what they thought would work for the Tahoe but am glad I did. Have to watch tie rod clearance with stock spindles, but stock spindle geometry > drop spindle geometry.