Originally Posted by
chaumi
As you say, it probably doesn't matter which you use...but personally I would go with the .net
And to give you extra piece of mind....there is at least one major poker site that's on a .net that carries considerable authority (and Google US rankings along with ROW), and almost certainly you'd find casino .nets as well if you looked. I'm not aware of any .co's in a similar position, though there may well be one or two. It's just more likely that none have been built that have been created, constructed, and aged well enough (and perhaps worked well enough with other 'tricks') to get the authority.
And I wouldn't say .net is a 'domain of the USA', it's a global TLD.