Factory Nav replacement

[YANKEES31]

I have factory Nav right now and was thinking of replacing it with an aftermarket one. My main reasons are I would like to add a remote on my steering wheel, and have my Sirius built right in along with XM(and I cant add the Sirius adaptor because of my production date), and wireless bluetooth Also it looks like many of the aftermarket ones are a lot nicer.

I was looking at the Pioneer AVIC-D3

You thinks this is wise move or should I just stick with the factory one.

Does anyone have any other experiences with this or suggestions on other models.

Thanks