We have seen during the past 4-5 seasons the Reds field a team that has been on the cusp of winning it all. Now if this were the 1st or 2nd year of that span I would not make the case I'm about to, but with this being the tail end of that window, the time for the Reds to win is now. The main players have peaked and while I'm not going so far as to say they are or will regress, they certainly are not going to get better. Therefore, if the Reds want to win the time is now. I have no idea what the money situation is and what the team is willing to spend this off season but a golden opportunity might be present with the Rockies.
Based on the article above, the Rockies could be willing to move both Gonzalez and Tulowitzki. The article goes on to say the Rockies are more interested in positional prospects rather than pitching prospects so I would put together a package of Mesoraco, Hamilton, Ervin and Travieso or Stephenson or Cingrani. The offense is just too inconsistent. A move like this gives the Reds a killer lineup 2-6. Besides losing prospects (which I could care less about when your on the verge of building a championship team) the other drawback is with all the money this move would bring in (again not sure if this is possible just a scenario) the Reds would have to let Choo walk thus leaving a void at the leadoff spot.
I fully believe that a team with Tulowitzki/Votto/Gonzales/Phillips/Bruce and a pitching rotation with Cueto/Latos/Bailey/Leake with Chapman closing would be primed for the championship.