Optimus1138: You can find Universe Galvatron currently at Rite-Aid. I promise I have seen at least one if not two of these at every single Rite-Aid where I live.
I'd have to say HA Jazz because he probably is the best HA available and I love the way it looks. I even had the money last summer when he started popping up everywhere. He even sat on the shelfs for quite some time (like until Christmas time) and I never took the plunge.
I almost made another mistake recently. I found two Ultimate Optimus Prime's at a local Kmart and deliberated with myself briefly as whether or not to buy it. I fell in love with the thing on sight (it looks so much better in person). Finally talked the wife into letting me get it and boy oh boy am I excited. It has become my favorite transformer toy and I am SO GLAD I went ahead bought it!
I also have a feeling that if I don't buy the Ark I'm going to regret it as well.