The problem with power boating in Colorado is that an engine loses approx. 3% of its output per 1000' above sea level. Denver is at 5280' so you would immediately lose 15% (a 50hp motor is now 42.5hp). Most of the better fishing lakes in the mountains are at an altitude of 8000' or higher so your 50hp is now reduced by 24% to about 38hp. Because of our topography either in the mountains or adjacent to them in the areas near Denver, we have very changeable conditions and the wind can go from calm to 50 mph with intense lightning/hail in the blink of an eye. That prescribes a need for having enough power to flee to safety. Even if you don't require the extra power in your general boating/fishing activities, it's still comforting to know that it is in reserve to minimize exposing yourself to these dangerous situations when they arise- and they will. Often, because of the mountains, you cannot see the storms approaching.
Here's a resource for checking current boat prices and availability: http://www.walleyecentral.com/classified/searchresults
Most of the boats listed are in the upper midwest and better deals are available there than in Colorado. Just many more boats there to choose from.
Think deep-v for the same reasons as the need for greater horsepower. They can withstand much greater inclement conditions than a modified v or, especially, a bass boat. I've owned all 3 types of boats and a deep-v will be much more stable and dryer in high winds and big waves. Because of their higher profile, they will catch more wind but that is preferable to having waves roll over your bow or gunnels. The extra power of a higher hp motor enables greater control in boat handling during a blow.
Enjoy the search.