TBH, I remember getting a Piel Frama leather case for a PDA once upon a time which looks just like the one they have for the Note. it was bulky, the belt clip was probably cool then but as the Note is so slim anyway I'd not see any reason to bulk it up even further with that design.
The official leather sleeve looks a better option to me. Currently using the flip cover and it's great, but if it turns out to be too bulky for a dock then a slim sleeve would be my next choice. A belt clip is so 2005