Sorry to stir the pot, but I have to agree with Blacksmith. Prototypes are often the original sculpt and professionally painted, and they make you go O_O OHMYGOODNESSIHAVETOHASIT. After mass production gets through with it, you're like, "uhm… it's still good, but why can't it look more like the original?" LOL figure collector bait and switch XD
Also just speaking as a person who has a great deal of ace merch (and that scrutinizes it on a daily basis along with the manga, anime, and fanart ace pics), the ones that I feel look most like him are Alabasta MBH, Keychain with him asleep, and the action figure one (also the WFC did a great job). That's considering how his face and look have changed, each of those figures suits him very well for the time period. GLM just doesn't resemble him facially well, his face is far too long, not a fan of the eyes either.
What do you think, Rona? You probably have a handful more ace figures than me. Darn you need MBH Alabasta Ace! He's so perfect qI almost want to buy him for you XD
As for the DX ace costing so little, I'd rather him cost $200+ and be the best thing EVER in paint, sculpt, and quality, than get another ace that's cheaper than the POPs. Of course, I have a lot of Ace stuff. I just want one perfect one. I don't care about the price. I was SO excited when I thought it cost more, because I thought, "this is it. THE ONE." Like those HotToys figures. Those are costly, but you can't really do any better. I'd like that for Ace.