[Batman]

If you do it right with a 10 bolt it costs about $850-$1000.00 to make it as bullet proof as posisble, depending on how much you want/can do yourself. Again with you running an A4 I think the 10 is the more cost effective and "good enough" way for you to go but if you plan on future mods get a 12 bolt now and save the money you would need in the future.