I have been looking into the above units as well. Had the same opinion as a lot of people here. (Would really like to go for the RNS for the oem look but it's the cost and outdated-ness that is putting me off.)
What I want is hands free, sat nav and most importantly bluetooth music streaming. However, I really don't want to loose the display screen between the clocks and the MFSW buttons. Does anyone know of a unit that supports that? As if I have to loose it, it may be a dealbreaker for me and I'll just stick to CDs.