I was going thru my parts bin a while back and thought to myself, I need a frame to hang all this stuff on. So, I picked up the Orbea Lanza off ebay (cheap) and threw it together. I ended up buying a few new parts but for the most part it was stuff I had, only a couple hundred spent out of pocket. After the build I was surprised when I weighted it, 21.9 lbs. If I wanted to put some more into it, I think it could get to ~20 no problems. I rode it on our Wednesday group ride this past week and man this thing is quick, really a fun bike.

Orbea Lanza frame - large
Salsa 29er fork
WTB laser disc lite/ Velocity VXC wheels
FSA stem/ no name Ti flat bar
XO rear der. and twist shifter
Kenda Karma 1.9 tires
Sram crankset 34/guard
SLR XC saddle
Profile Design Elite Strada seatpost
Juicy 5 brakes 185/160
XT 11/34 cassette