I am a 2L at DU, and my significant other is a 3L JD/MBA candidate at CU.
CU definitely enjoys a slightly superior reputation regionally, as well as nationally (especially among CU grads, of course). However, DU has been climbing consistently in terms of its ranking and the quality of the students it attracts over the past few years. I agree generally with the comments posted by "thinkinoutloud." The one thing I would add, however, is that you can typically achieve in-state residency status at CU by your second year. This makes CU a much more viable option, despite the DU scholarship. This site delineates the steps you must follow to qualify for in-state tuition: http://registrar.colorado.edu/Students/tuition_classification_regulations.html#qualifiedperson
. My gf and I moved here from Delaware together, and she was able to qualify for in-state tuition after her first year.
I would also add that Boulder is a really great town from a quality of life standpoint (I live there as opposed to Denver). I prefer it to Denver. DU has the advantage of being in Denver, but it is not situated in a very exciting neighborhood. That said, it is still in a great location, with its own light-rail stop. It's also situated just off of I-25, which gives you convenient access to downtown, the mountains, etc.
DU also has a different feel in terms of the classroom experience. While CU takes a slightly more classical approach to instruction (the final exam is typically 100% of your grade, more Socratic method, fewer incremental, intra-semester assignments), DU is a bit more progressive in its approach.
I would suggest that you weigh your options in light of the above. After all of the math is done, if you're saving at least 10,000 dollars per year by attending DU, DU is definitely not a bad option. Otherwise, I think CU is a better option. Fortunately, you really can't go wrong either way. Both schools have solid reputations and consistently turn out stellar lawyers.