The fluffy is the highlight of wave 2 imo. The others are nice, but you know what you are getting. My feeling is to choose and pick only what you like most - then it become more manageable price wise.
Zartan is the star of wave 3, again imo, but the color changing feature gets me.
Yeah the temptation is there for never done before characters like Ramar and the Fatal Fluffies. It is great to see them finally get a figure.
The rest though are easy to wait for a sale, if there ever is one, because I already have a version of them, or the look at some scale. Something like Arctic CC is great, but between the design choices and the fact I have CC in multiple scales, across different lines, means I can wait to see if this ever goes on sale.
Zartan would have been a tough choice if Hasbro hadn't revealed their Classified version already.