I did not buy the economy tickets yet as my dates are not set but there's plenty of J upgrade availability on Expert Flyer for that month.

The chart that I'm looking at is the Star Alliance upgrade chart, not specific to TK: http://www.united.com/web/en-US/cont...2012-03-03.pdf. I was hoping someone here would have experience specifically regarding upgrades on TK since they don't have the econ/bus/first designation like most other airlines. Looking at this chart makes me think it would be 25K one way, but upgrading on TK with TK miles (no Star Alliance involved) is 45K, so the 25K seems way too low in comparison.