I'm not a woman but I do have a fetish for colognes and perfumes.
I recommend that the OP go to the mall and sniff stuff out, then buy the stuff online. Its cheaper that way. And dude, you should wear stuff you like. Cologne should be an accessory to attract women, not a tool. If the ladies don't like you, they won't like your smell either. See what YOU like and wear it with pride.
I like all different smells, but I really like the really fresh and/or slightly sweet, feminine colognes. Try:
Armani Mania (I get the most complements out of this one. My favorite for special events)
JOOP! Nightflight (smells like clean sheets right out of the dryer.)
Hanae Mori HM (just got this. citrus fresh scent. I love it for casual wear. CHEAP!)
Drakkar Noir (very good! very freash. CHEAP!)
YSL Body Korous (eucalyptus, vanilla smell. also fresh. my gf likes this one. CHEAP!)
A*Men (expensive. You either love it or hate. try it. vanilla, musk, candy scent=sexy)