Mines almost done, I'm lowering mine 2.5" and needed to take the truck pan off to put on the CTS-V...will have pictures tonight:
http://www.ls1tech.com/forums/conversions-hybrids/817787-lsx-oil-pans.html
What do I think, well, the ctsv pan back (its deepest point) is 6.75" deep. The LH8 (Hummer pan I believe) is 7.5" deep, and the stocker truck pan is 8.5" Just to get an inch more is great, but how low is your car? If it is low or goign lower, find the CTSV pan