Re: TR 2025 or STAR
Both funds are good. If you are young you might want to be more aggressive then either of those. My wife is retiring in a few months and I am recommending she transfer her 403b to the VG 2015 Fund. We would not pick the Star Fund as we already have our Roths in the VG Asset Allocation (VAAPX) Fund.
Picking a particular fund should include some understanding of your overall portfolio including real estate, pensions/SS, stocks, bonds & other assets. But on its own merits the Star Fund is pretty good or at least a good place to accumulate money until you might work out a different choice or asset allocation.
Old men ought to be explorers