When you get to Fort Collins on Sunday, have lunch or dinner at Choice City deli. They have an amazing tap and bottle selection and some great meats. If you need another meal, try Coopersmiths downtown or Cafe Vino on College Ave. Coopersmiths brews their own. Cafe Vino is another place with an insane selection.
I personally like the O'Dells tour more than the New Belgium, but both are worth it for sure. I don't know if Equinox brewery is doing tours yet, but they have some pretty good taps. They may be closed Monday though, I know the LHBS attached to it is.
For Denver, I would not want to miss Great Divide or Falling Rock (lunch maybe?).
Oskar Blues is awesome.
Left Hand in Longmont is pretty cool.
Avery has great beer, but the last time I went, they didn't have anything I couldn't just get in a bottle at the local store.
The Silver Grill in Fort Collins is a pretty good breakfast.