Have you thought about what you WANT from your power plant? That's super important. The difference in power between a stock LS and a super-de-duper souped up L6 is just incredible! If you are going to street drive and autocross and even drag race your car, I recommend you go with a stock cam. The factory engineers have done a really good job with the LS series and a lot of times we only screw up what they have done well. With my stock cam LS2, I can lug around corners in 3rd gear with ease. I can stop momentarily at a stop sign and take off again without depressing the clutch using first gear. I can cruise at 70 in 6th gear at about 1500 rpm (tall tires). I can autocross in 2d gear if I want to try for a faster time, but I can keep the rear under me better and not exceed site-restricted dB limits by staying in 3rd and running a lower rpm. The car does 1.43 sec 60' times and runs 7.0 at 100mph in the 1/8-mile, 11.0 in the quarter at 126mph and 148mph in the standing 1/2-mile, and Im hoping to break 160 in the standing mile. It doesnt run hot and i can hot-lap 26 passes in a night without a mainenance issue. ALL WITH A STOCK CAM. As for me, I plan to spray this motor to an extra 150hp before I remove the water pump to install a bad idling cam that gets me MAYBE 70 more hp AFTER adding a FAST intake ($900), larger throttle body (?$), and cam kit ($1000 after cam, lifters, springs, retainers, pushrods-and a chance to kiss a valve with a piston). Just my 20-cents worth. Get the dang thing on the road!