Dress Attire When On a Date (As a Male)?

The dresses that you are considering are both classy and beautiful. If they are an indication of your gf's tastes, then I believe that she would like to see you in something equally nice. You could wear a pair of nice pants and a sports coat. You could also wear a suit as I don't think it would be too formal next to your gf. But, the important thing is to wear what makes you feel the most comfortable and attractive. Self-confidence (as opposed to arrogance) is very appealing in a man. Have a great time!