The ones you mentioned are oft discussed on the forums...and I just ordered Next 2020-2 maps from
http://www.bimmernavupdates.com/...I selected Lifetime FSC code + USB drive since the 2014 X5 that it is for has never been updated and still has the original nav maps. I would suggest checking multiple sites because some may cost more than others for the same thing.
BTW, I've used this vendor before for my 2013 F06 which has the premium maps. Again, I used the USB thumbdrive + Lifetime FSC which is easy-peasy if you don't feel like taking the less expensive route and downloading the files then uploading them onto your own USB drive.
