Thanks for the welcome SH!
I was thinking the same about the 6 inch sheath. I've got a BK&T9 that rattles in its own sheath; a knife in a larger sheath is potentially worse.
There are lots of sources for sheaths over here. I personally don't care for leather but I know folks who have good kydex-fu. I kinda like the fabric sheaths though, especially those with pockets on the front.
Claudiasboris