I currently work off of Colorado and I-25 and I personaly do not believe that a tower of that magnatude should be built in the Colorado Coridor area, but that's just my opinion. And the DTC? Personally I feel like even though the DTC feels like another City/Downtown, in reality a tower over 700' would look funny in these areas.
The DTC IMHO after it fills in a bit more might be able to pull off something in the neighborhood of 400+ Feet but certainly nothing over 500' IMHO, however this is only my opinion and if a developer were to construct a new tallest in the DTC? Who am I to say anything? However I do feel that if something like that were to happen? It would hurt downtown Denver, think about this Denver could easily have 2,3 maybe 4 or 5 new tallest buildings if there were no DTC, and all the buildings in the DTC were converted into downtown Denver...

But that's okay there is plenty of room in this City for more, it's not like Denver is hurting.
I wish Phase III of the Offices by Dave & Buster's would have been completed! That would look nice on the Colorado Blvd Corridor IMHO. The DTC is doing just fine with it's own developments right now, they have several cranes up constructing new towers as we speak. So all an all the urban area's in the City are doing quite well, but a new tallest in Downtown would be heaven.........