Domain name branding: Use domain hacks (country extensions etc) or use a meaningless .com?

the time you took to ask this question has cost you $100. A domain costs a few cents a month  
But seriously – the best way to go is to have an appealing name that is not too far from the original message you are trying to convey. 
In the two domains you have pointed out I would go ahead and use both of ‘em. You could run into copyright issues with “Enigma” because I’m willing to bet my three newest pairs of boxers that someone on this mother earth holds the rights for the name with all associated credentials to it. Please also considder that and do some research on it. 
The bottom line being: the shorter and more meaningful for the product and the easier to associate and remember, the better.