Hi Skilsaw,
I'll give give you some Info.

The Koga is BULLETPROOF with top notch components. If you go to the website it's a wet dream.
There are only 2 dealer in the US. One in California and the Other in Maryland.
On the official website you can customized the bike and then you can send it to the dealers.
http://www.koga-signature.com/en/Koga-Signature.aspx

I got mine from Eric, at
Commuter Bicycles
ph. (805) 569-5381
www.commuterbicycles.com

Excellent guy, great service.
Anyway I'm 5'11" and my bike is a 57cm 26" wheels and I had most things included.
If I had an extra grand I would have ordered the Rohloff gear hub on the bike.

Mark Beumont broke the world record on February 15th, 2008
with a Koga and a Rohloff. If you have a chance check out the BBC videos "The Man who Cycled the World"
Also on February 18, 2010 Beaumont completed his latest quest cycling from Anchorage, Alaska, USA to Ushuaia in Southern Argentina, in record time but he added an extra bonus.
He climbed the 2 highest peaks on Alaska and the one on Argentina in one single season. Again he did it on his trusty battle proof Koga.
The BBC video of this ride is called "The Man who Cycled the Americas".
BBC makes excellent videos and those 2 is a MUST for any Adventure Rider IMO, but the video is about His adventure and the KOGA Bike.
http://www.bbc.co.uk/blogs/cyclingtheamericas/