L'eau D'issey is a nice, fresh floral option.. If you are branching out from Cool Water.. I might suggest the following...
John Varvatos.. widely available, pretty inexpensive..wonderfully light and classy fragrance.. mix of citrus and leather with a vanilla hint at the base of it.. I garner many compliments with this fragrance
Paco Rabanne XS... very fresh/crisp..and very versatile... nothing that will overwhelm those around you... nice sharp, clean fragrance with a slight peppery wood note... not much sweetness to be found here
Aramni Code - light, sweet sexy oriental fragrance.. quite safe and pleasant and also a compliment getter.
Gucci Envy - as a sexy, evening alternative. A green woody fragrance that has an addictive tangy/sweetness to it... that you might have to sample a few times to truly appreciate
Iceberg Twice - this can be found very cheap online.. great value.. frosty smelling, citrusy.. fresh..floral..it's got it all... very pleasing fragrance which (in my opinion) would be a more exciting alternative to l'eay D'issey (and fewer people around you will be wearing it)
Burberry Touch - a violet based musky fragrance.. light, sexy.. and quite under-rated on this site.. also quite inexpensive..
Burberry Brit - a masculine take on baby powder.. vanillic, sweet.. a hint of rose.. very well appreciated by those in my circles..
Bulgari Black - smokey rubbery take on vanilla... smooth and very pleasing
Anyway, these are some safe... basic designer frag choices.. if you want to be more adventurous and break out your wallet.. there are tons of more options...
If you like Cool Water, Creed's Green Irish Tweed would really appeal to you.. it's a better blended take on the same Cool Water type fragrance.. Creed's Milliseme Imperial and Silver Mountain Water might also be of interest to you..
Anyway, welcome to the board..hope this helps.