You aint got an option my friend, the changer is useless with any other HU, the stalk and display can be controlled/used, and I seem to remember someone did a definitive post on here about just that, but there is only one brand or two that can use the display, but loads which will use the control.
So, on the whole, search for the answer to which HU can use the display, but you will have to get a.n.other changer Im afraid.