I’m a Colorado native (almost) and DU’s reputation is certainly on the rise (I went to the rival undergrad, Colorado College but went to DU for law school). DU’s endowment is fairly substantial, has a beautiful campus, and hosts many concerts/cultural events (in addition to having great lacrosse and hockey teams - so sporting events are a becoming a bigger draw). It’s also in a safe part of town. There is a ski train that takes you to Winter Park and I’m guessing kids car pool up to the ski slopes regularly. I don’t really know anything about Tulane. Good luck with your decision.