I wouldn't worry too much about looking like dm_drift, no offense to Dux of course but its been an established map style for ages. Of course the lighting etc you may want to tweak not to give anyone the wrong idea, but on the whole the map looks very promising ![]()
One final thing I would recommend is getting a theme going (sorry if this sounds patronizing or stupid) but if I were you I would work on adding something interesting (rain, fog, snow, technology, color, you name it) to set the map apart and give it a unique twist.