My gut is telling me to ask for opinions. That being said i hate it when people come on here and ask "should i buy this?!". If you can't beat them, join them!
I was in the same boat on this one a few weeks back when my exclusive was converting. I decided to commit to it because, as others have said, although different, it is definitely the Silver Centurion armor at it's core. I also like the exclusive, so there's that too. And this will look even cooler as you don't have the mark v to detract from this unique color scheme.
I also speculate that the mark 42 will be around awhile because A) price point, B) hype for Iron Man 3 passed for many, and C) I bet people are going to drop it once they see that the mark 43 is identical so far, but with inverted colors (which I think many will prefer over the diet coke can armor) That being said, I am still pumped for the Mark 42 personally.