it will take you 20 minutes to do the swap all you have to watch for is the MFG year of the unit you're buying, if it's a 2011 model no unlock code is needed, 2012 to 2014 you need to know the VIN of the car it came from and serial number of the unit to get the unlock code.
Also if you already have SIRIUS no need for a GPS antenna, if your current unit doesn't have SIRIUS you need to purchase the GPS antenna.
Look for the replacement unit at scrap yards, prices go from $400 to $800 or $1000+ on Ebay.
I did this on my 2013 SXT and it was worth every penny!!!