If you want a sleeper look, just get a no-name high performance "turbo" muffler from Autozone or your local Midas/Meineke shop. You'll need to know what size your pipe is (I think stock size on a LX is 1.5")...so the inlet to the muffler is correct and the pipe fits. You'll prolly have a difficult time finding a turbo muffler for a 1.5" pipe tho :o
I would recommend saving some money and doing it right the first time, instead of ghetto-rigging some crap on there, just for the sound. I saved up a little money (I really wanted a $400 Thermal R&D stainless, but couldn't afford that when my old muffler finally fell of
), and got a 2.25" pipe from the cat-back, left off the resonator and got a turbo muffler. It sounds great, and looks stock, except for the close observer that might notice the larger pipe (with no big-ass tip either.) Total setup, about $260, installed from my local Meineke.
Good Luck with your decision.