My advice is to pick up the older figures first. You can save up enough to buy the Rattrap/Crosscut/Tankor wave before it comes out, trust me.
Cyclonus is pretty much perfection in the Challenge at Cybertron (or Battle in Space) package. The mold is great and the colors are spot on. At the very least, buy him alone if you get the opportunity.
Rodimus looks good with his cartoon accurate colors, but the one thing that bugs me is the opaque blue windows for his alt mode, instead of clear plastic. It hides a lot of detail for the interior of the car, like the dashboard and steering wheel. You might want to consider holding out to buy United Rodimus Prime instead, which looks fantastic, IMO. His clear blue windows are back, and the paint detailing gives him that more mature "Prime" look if you prefer your Rodimus to look like a true Autobot leader on your shelf.
Galvatron looks nice with white swapping out his medium grey plastic as compared to his earlier releases, but your mileage may vary with that mold.
I got the Universe (Asian market exclusive) three-pack because I prefer not to have rub-signs on my characters if possible. Plus, I like the bright white Galvatron, though he is soon to be replaced by the vastly superior Decepticon Specialists version. I had bought the RtS set a few years ago at retail, by the way. If you don't mind the rub signs, I might be willing to work a deal. PM me if so.