Whenever I wonder about this same thing, I create a cart of aftermarket parts. This rules out the changing oem part numbers. I've never been wrong doing this. Buying parts for a '15 Husky has been a challenge as most mfg don't have that bike in their systems yet. I just but for the newest year 500xc-w. My GPR stabilizer is he same for pretty much all KTMs but the GPRs all replace the lower clamp, so that makes a difference. If you get the HDB for your new bike, you can get his lower Scott's mount, then that Scotts would transfer right over.
Fwiw, I 100% support your idea of getting a 500
![Big Grin :D :D](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)
. You'll love that bike, I can guarantee that. IMO, skip the exc and get the xc-w. You'll generally save a few bucks, not have a bike that's detuned, and not have any problems getting it remapped (I've heard dealerships can get fined or get their licenses yanked if they get caught flashing an exc, even in states the smog isn't required).