I'd probably take that trade too if you want the foams real badly, and likewise, the Sprites would be the one pair that'd be hard for me to let go. Those 4 pairs might retail for $680 or however much (assuming you got them all for retail), but the foams go for about 800-1K, at least right now, so you'd be getting back some value if you end up not liking them and can flip them. And like you said, I think everything else is easily gettable again if you want them down the road. I'm definitely more about having fewer pairs I love instead of just a whole of bunch of stuff in my collection/rotation that I just feel alright about.