5,000 - 10,000 are figures that sounded reasonable. As far as I know, a final decision has not been reached.
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Community involvement is the key.
Right off the bat, I can tell you this coin needs a new logo/icon. Something like the Steam-icon or the preferences in iOS or something looking better than the old one. Machinecoin isn't a bad name, but I'd shorten it to "Machine" or "Machinery" only.
5 - 10K for a MN is too little, it will end up like ARC or one of the small MN-coins that constantly lose in value and fail to create any hype. Given the number of MAC in existence, you'd want to go for 50K/MN at the low end, that would be $500 right now. If you limit the possible number of MN's to 400 (50K) or 200 (100K), you will see an ultra-brutal run on the coin. Personally, I would create separate tiers - staking gives you a certain percentage of rewards, but running a MN much more.
And then I'd say it needs a better story - the steampunk image is nice, but what features does/will it offer? Private sends and segwit aren't anything new.
Mobile App to do instant tips on performances?
Built-in exchange?
Decentralized mining pool on MAC as a smart contract for mining other coins?
something better?