I am a big lime fan, but haven't quite found the one yet. Tommy Bahama Set Sail St Bart's is on the top of my lime based fragrance list. Notes of lime, tequila, and a little coconut is what I basically get out of it, dominated by the lime though which is great. Problem is.. notoriously.. its longevity is very poor. But, it is an excellent fragrance if you don't mind reapplying over and over.
Above that though, if you can afford it.. Tom Ford's Azuree Lime. I guess this one is more or less just another lime fragrance to many, but I think it's excellent too. Mostly lime, with a little bit of a leathery thing going on in the background, but very subtle. Again longevity though may be an issue, and considering this is perfume strength I believe, it's not worth the money, since it only lasts about 4 hours.