swapping RNS-E for Dynavin D99

first off am I mad to consider this? I want decent bluetooth and ipod functionality on my HU and the RNS-E seems limited in its capacity to offer this (2006 model). So Im considering buying a Dynavin and selling the RNS.

Have a few Qs though

- will my steering wheel controls work?
- will things display on the DIS? Not a big deal as the DIS is rubbish anyway (monochrome red one).
- will things like oem gps antenna etc work ok?
- will I be able to remove all the things required to sell the RNS or do I need to keep some? GPS antenna, bluetooth module etc.

or maybe Id be better getting a newer RNS and getting the MMI type interface for IPOD?

Thanks for any info guys.

oh dear worse than the RNS-E?

Also tempted by an aftermarket doubledin but the dynavin seemed a bit more integrated