It would be nice if you could tie it all together as a set so it doesn't look like you just randomly added another band (Unless that is the look you're going for). One poster suggested setting the pink stones in platinum, which is a great idea, but since you prefer pink gold, you could instead change the pink emerald cut diamonds on the band to white emerald cut stones. Then you would have white and pink stones together and the white emerald cut stones on the pink band would give a nod to your emerald cut engagement ring. This would make the set "make sense." If coordinating your rings isn't the issue, then it doesn't really matter, just pick the one you like best. Congratulations!