Well, from an end game perspective then, with both types of armor being able to move at the same speed with their Conditioning and Unhindered perks, wouldn't either route be viable? If they both have the armor cap and both the same movement speed, you pretty much can base your choice off of looks.
I'm talking about playing on Adept though, I understand that with the style you play it is almost required that you use Heavy.

To smith a type (ebony/glass etc) you must have the perk in smithing for it. The perk also allows you to enhance those items for twice as much as standard. With that you can craft and upgrade any armor type to the cap.
If you do not perk smithing you can not craft any gear beyond leather, but you can upgrade standard items to a high level.
As of now I have Dragonplate upgraded to Legendary (I used pots to increase beyond Legendary but I see now that it was absolutely useless having 800 defense), but after reading about the Rating cap I was worried that I chose the wrong route with Heavy Armor. Now being aware that both sets run the same speed with the proper perk, I am satisfied with my choice. Dragonplate/Daedra ftw.

Thanks for the help, really appreciate it!