Test rode a Sir 9 with matching steel fork, while it was comfy and a joy to ride for xc, when pushed i found the fork a bit flappy, brake judder and toe overlap.
I went KM, they have a rep for a harsh fork. If only doing xc maybe change the fork. For me when i gave it some stick it had direct steering and stable, only broke the lower headset bearing.
If ridden hard or a heavyweight rider or the bike will be loaded up then a good workhorse.
From ragging one in DH races it was immense fun, like a roided up bmx with a nice comfy ride. The more it was pushed the nicer it was, apart from bursting a headset bearing 🙂
I got a 2011, the facelifted frame design but the last year of the v-canti brake mounts, the frame is a keeper.
If i had Sir9 money to drop i would consider a custom frame as well.
At the time i did consider a Swift, but the KM had more options, Swifts are nice though….