I have the FUTV front A arms and diff skid. Using the stock 3/8 HMW or whatever it is skid that comes with the RS. Work well for me. Install is easy. Grab a jack and use it to force the plate to bend up onto there to get the bolts close enough and just secure with thread locker and supplied hardware.
The FactoryUTV (FUTV) are the only way to go. Have one on my 2014 and also the X3. I went with the 1/2" on the 2014, but decided to go with the 3/8" on the X3. It is plenty of protection. They do not have the A-arm guards yet for the XDS, but as soon as they are available I will be ordering them.