what kind of suspension work do you have done? If you're already using a lowered susp, you might want to consider getting some thats stiffer, along with all the roll bars, strut bars, sway bars, and all the other bars that the car can handle, to give the frame as much rigidity as you can. You'd be surprised how much the right suspension can hurt or kill you in the right or wrong circumstances. If you got that all covered, def go with a LSD. Trust me bro.... im the king of "el cheapo" mods, from pvc intakes, to cut springs, homemade piggyback ecu's, ive tried it all bro. Never tried to weld tho as this sc is my first rear wheel drive car. Anyway, my point is, you get what you pay for. In the end, it is all about quality and durability. What would you do? Save a few hundred bucks on the rear end, or spend it and fore-go a possible nightmare later on. Wow, i sound like my parents.... ew. God bro, do what you want..... ew.
juancho