If you are getting a nice leather band and want to take it to the next level, definitely look into getting a deployment clasp.
Having owned some nice watches over the years, it's tough finding a good aftermarket deployment clasp (I'm looking at you alibaba). A lot of watch guys out there like RHD deployment clasps, they are really affordable and also very high quality. Bob Davis is also awesome to work with.
Altogether, a really nice Hirsch, Di-Modell or Fluco calf or alligator band AND a deployment clasp will cost you ALOT less than the $150 classic buckle, and you'll literally be wearing some of the best quality leather out there in terms of watch straps. For around $100 you could have a super high quality leather band (think really high end watches like Panerai or Breitling) and a solid deployment clasp.
RHD Deployment Clasps:
http://www.mywatchmaker.net/deployantclasp.htm
Some bands I trying to decide between:
http://www.holbensfinewatchbands.com/hirsch-terra-brown/ (little worried about the 5mm at the lug)
http://www.holbensfinewatchbands.com/fluco-horween-shell-cordovan-brown/
http://www.holbensfinewatchbands.com/hirsch-buffalo-brown/