i ordered a 16x9 widescreen display. i am now looking for a dvd brain to power it. does it matter which one i buy, mkii, mkiii, or mkiv? i have a 2000 328i. In reality, i do not care how fast the cd/dvd system works, i just want to hook up the nav-tv piece to it so that i can watch tv. Can i just purchase the cheapest brain i see (MKII)? Please help.