I've had the non HD idrive in my 08 and HD in my 12 and I can't live without it. Non navi cars are way too boring plus it's the 21st century. Corollas have navis nowadays.
Past:12 E92 335i/ 08 E90 335i/ 02 E46 325i
Present:15 F80 / //M3 + 15 MK VII Golf