I have ordered a few things from KTM Twins, but they take forever to ship and they are pretty much retail+ on everything they sell. It depends what you need, but sometimes you can find it cheaper and faster from other places. I have a Giant Loop Coyote which is very similar to that bag. The one you posted looks nice. Eventually I'd like to get a side rack/ luggage system for big trips and leave it off for when I hit places like Nelson and day loops near town. The loop luggage is tough for carrying a tent. Maybe I need a smaller tent. haha
Get a skidplate asap. Check out Flatland. http://flatlandracing.com/Merchant2/merchant.mvc?Screen=PROD&Store_Code=FR&Product_Code=24-46
Also this is a decent rack that you can carry a rotopax for extra fuel if you don't feel like dropping $1400 on a RR tank. lol http://www.nomadic-racks.com/store#!/KTM-690-Dual-Sport-rack-2008-present/p/26154096/category=976076