Thanks for the feedback everyone. I couldn't decide so I just made my trip longer....

Phoenix for 3 weeks in February, a few days at the Los Angeles velodrome, than a full month in Tucson. Im on the edge of Scottsdale in Feb so I don't have to contest with the city too much, hopefully spend some good time on the TT bike on the flat highways. Then in Tucson Im somewhere near the NE, can't remember but its only a few miles to the start of some of the big climbs so ill spend all of march at elevation.

Looking forward to it, its -23 with -41 windchill here today... If anyone can suggest some weekly rides I can join. Im also looking at doing the VOS race and the tucson bike classic.