This took a little more doing. So loft, barcelona chairs - I made the assumption that you wanted to maintain the same feel if the rest of your space holds some cohesion so I was mainly looking for mid-century modern pieces with cleaner lines and a sense of air. This would most approximate a barcelona chair, I think. Also is available in black and a pair will just meet your price max!

Hi John, Have a look to this chair. Simply irresistible. Maybe over your budget but hey, what else is new? Kruze low back swivel lounge office chair with fabric or leather and black american walnut veneer outer shell- online office furniture store in Canada

I am also including this option, not just because it is more cost-effective, but because if you entertain the way I do, sometimes more than one person will pile into a chair for one. My previous selection would make that slightly more difficult - and while that above option is sleek an linear like a barcelona chair, unfortunately it also has arms that prevent those sorts of party shenanigans. This option here is a little more fun, perhaps a little less serious, and slightly more versatile without losing too much in the way of cohesive integrity. Again, this also is available in black.

Same carbon chair for less, definitely a cool design.

Another cool loft design

Lounge chairs from BrickellCollection.Com