A few years ago, I picked up the deluxe sized Armada Optimus Prime figure. I really like the figure, specially for an AEC era TF. Now in my collection, I try to keep things equal between factions and when doing so I try to match up figures with a rival. But Armada OP has always been a loose end for me where I havent really found an appropriate rival figure to display him with. And since I really wasnt into TFs for the most part during Armada or Energon, I'm not at all familiar with the toys, I only started picking up some of the mainline toys during the Cybertron series. Now, after looking online, I found that I kind of like both Armada and Energon Megatrons but I believe they are both way too big to scale reasonably well with the deluxe OP. I thought about Armada Starscream but I think he's a Voyager and he might be too big as well. So what I'm looking for is suggestions from the Armada or Energon lines for an appropriately scaled figure and reasonably good character to go up against deluxe Armada OP. Suggestions could be simply your favorite figure (and why). Also pics would help me alot (or links to TFU.info pages) since like I mentioned earlier, I am not familiar with these two series. I guess I should also specify I'm looking specifically for a Decepticon counterpart to OP, not really interested in picking much else from the line.