I have it on my coupe and am very happy. A definate improvement over stock.
I also removed my rear cats and find the sound to be near perfect. Aggressive, and loud under load/accel but reserved at cruise. Very euro sounding, not ricer. The Magnaflow by itself sounds great, but I wanted even more growl and the cat delete accomplished this and removed 75% of the drone that does accompany the MF at around 2k RPM. (in a coupe anyway)
I can't imagine the stock tips would make any audible difference, and the MF tips look pretty good. Purely an asthetic choice.