i was just in Taiwan so i picked up a Hori crystal case (protector) for about $10. here's my review:
it closes just about all the way. even though it uses clips to hold the case onto the DS, the case has indents on the opposite side to allow room for the clips when closed.
it has a rectangle symbol on the top cover, not the DS logo. it's basically the outline for the whole logo (one big rectangle).
the top cover does NOT cover the whole DS!! it's just like the imitation one i posted in this thread. i thought Hori would've done a better job than this.
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CONCLUSION:
i seriously do not understand why it's so hard for companies to make a case that fits the DS perfectly. here's the summary on some of the best options:
MadCatz Showcase: the top half covers the whole top of the DS, it has the logo imprinted. however, it does not allow the DS to close all the way.
Hori Protector (crystal case): it allows the DS to pretty much close all the way, and has partial logo imprinted on the top cover. however, the top half does NOT cover the whole top of the DS.
Generic crystal case from ebay: it allows the DS to close all the way, doesn't have the logo imprinted on the top cover. and it also does NOT cover the whole top of the DS.