I made Koolhaas for my Dad for Christmas and just love love love it! It feels luxurious, but it's economical (takes less than a skein of malabrigo-quite a bit left over). It's a simple project, but the stitch pattern is different so it keeps you engaged. I often struggle with presents for the men in my family, so I was thrilled to find this little gem.

Pattern: Koolhaas from Interweave Knits Holiday 2007, by Jared Flood aka brooklyntweed
Yarn: Malabrigo worsted
Needles: 16" circulars, size 6 for ribbing and 8 for the rest
Modifications: None! Made the larger size.

I go on and on in the blog, if anyone's interested.
Thanks for looking!