Good choice. For dining I recommend the Craftwood Inn in Manitou Springs, about a 10 minute drive from COS. In fact, Manitou Springs is really a neat little town - lots of interesting shops, galleries, and cafes.

The main tourist attractions are Pikes Peak, the Air Force Academy, and the Garden of the Gods. It depends on your interests.

Cripple Creek and Victor are a couple of old western towns that have been restored and now have a bunch of small casinos. Totally different experience from anything in Nevada. It's about a 90 minute drive from COS. Interesting, even if you don't gamble. You can continue south to the Royal Gorge and circle back to COS. At the very least it's a gorgeous drive.