Getting away from niche offerings, my cheap-and-cheerful summer recommendations:
Guerlain Cologne du 68
Eau de Rochas
YSL Pour Homme
Today I'm wearing Gaultier 2 (or Gaultier squared, whatever). Very odd bottle design. Do you empty one half and then go to work on the other, or work through the two halves at the same rate? My left brained thinking demands an answer. Oh, by the way, it's nice.