Help me organize my collection?

I am not familiar with many of the scents on your list, but I usually follow this rule: Heavier scents for evenings/colder weather; Lighter/crisper scents for days/warmer weather.

Experiment. You will notice which ones you like more in the days and others you like to wear in the evenings. Le Male, for example, would go very nicely in the evening, but might just be a bit too much for a hot sunny day.

As far as some recommendations, the two you mentioned are really nice. Classics, actually. You also might want to check out Versace Dreamer, Gucci Envy, and Bulgari pour Homme. These are somewhat similar to those you mentioned. Again, experiment and see what you like.

Good luck.

Okay. Going in order from top to bottom of your list we have:
-Acqua Di Gio..................Day or Night
-Kenneth Cole Reaction....Day or Night
-Kenneth Cole Black.........Night
-RL Romance Silver..........Day or Night
-Davidoff Echo..................Day or Night
-VS Very Sexy 1..............Day
-JPG Le Male...................Day
-Escada Magnetism..........Night
-Liz Claiborne Curve..........Day

There is nothing wrong with owning AdG although it is very common. That is a scent that just never smells bad. No one I know doesn't like it. I have a friend who wears it out at night and I always notice it and like it. Keep it and use it because people like it and it is not offensive in any way so I feel like it is a perfect match for what you wanted you scents to do.

Magnetism is one of my favorties from your list. I have another friend who wears this one out almost exclusively at night. It is great for grabbing attention and I think you should try it out for evenings and see what kind of reactions you get.

I think that you should look into something a little more unique (sometimes means more expensive) so that people will recognize that it is you they smell. You can smell good in your own way. I really like D&G pour Homme but so many people own it. I almost expect to see scents like that in my friends' closets. I can't tell you what girls would rather smell (good smells they can identify versus good smells they never smelled before). Some people like to be able to recognize a scent so it gets tricky when offering suggestions so I would say that you should really just wear whatever the hell you want and not care what people think. You'll always smell good with those scents you have.

I know you don't want to be obtrusively obvious while wearing a scent but you are not wearing much and I think you are overestimating the power of some of your scents. I am conservative and I wear 4 sprays. You wear 2-3. I would add a spray to the neck or the wrists when you are out at night at your special events. That'll deffinately help longevity and sillage. Hopefully it'll turn some heads.

Hope this helps.

I think Envyus gave you great advice - I'd only add that I think JPG Le Male is more of a 'night' scent IMO.

If you want to add a new day and night scent to your wardrobe, that fits you and your budget I'd suggest:

Happy for Men by Clinique (Day)
Obsession Night for Men (Night, duh...)

Good luck and welcome to Basenotes abc123. Stick around and your collection will ultimately transform itself in a year - and you'll be the best smelling 17 year old for miles.