I'm not sure you should be picking the tubing unless you really know what you are doing. To me, that is the job of the builder to determine. That being said, I would get a bike made from OX Platinum (True Temper). I love my 05 Poprad. I've used it for CX racing, SS CX racing and everyday commuting. It is probably my favorite bike out of the 16 or so in the garage.