What do you mean by (3) it doesn't reveal your underlying platform? I don't think URL structure would be of much concern here, especially if you where experienced in exploiting websites? Maybe I'm wrong, not to sure what you are referring too.
In regards to you leaning towards this one, surely posting it as a directory /hotdogs/ implies that it is that, a directory and not a just a page about hotdogs? I'm digging a bit to deep into this, as I'm sure it won't make that much of a difference, but I'm just saying, it seems more logical to have it .php or .html