All three are very respectable openings. And basically what the previous posters have said is very true: find what you like by playing them. However, I'll just add some aspects for you to think about.
Firstly, the RR is dangerous against Classical but some people thrive on this excitement. And it's not like playing the Najdorf or the Svesh is a walk in a park anyway. In all three of these openings, if you know the position better (or know more theory), you have a great chance of ending up on top. In addition, people who play the RR against you will probably at a psychological disadvantage: they would have studied it less than you, basing their bet on no one playing the Classical against them because the RR meant to be the magical bullet. It's not like there is a straight-forward way in the RR to 1-0, because there isn't. And yes, Kozul's games are recommended.
Then we come to the Svesh. It is sound but it can only unleash its famous dynamic nature only if White lets Black, imho. Ie, the Sveshnikov will be the ultimate Black weapon if there isn't the 9. Nd5 variation. Look at the recent games in the Morelia-Linares Supertournament (especially Leko's masterpiece, in which he basically targetted Black's backward d6 pawn until it falls into the bag) and you may get the feeling like me that that White has all the fun after 9.Nd5. Sure, Black should hold the balance with accurate play and the position is more-or-less equal. Yet, it seems that the position is more equal for White.
So that leaves the Najdorf, which I believe will have the most long-term-potential for you. The downside is: theory. IMHO, there is no longer a super-sharp, popular, sound opening without loads of theory. You may play a game without one single out-of-book move then end up in a losing endgame or something like that. But if you put in the time, then yeah, Najdorf is a fantastic weapon.
Personally, I have dumped the Sicilian for the French. The French is MUCH better. It is like....

I'll stop now

. Anyway, I hope that helped. *Now I think I'll just run away before the Sicilian adrenalin junkies start flaming me*.
I cannot help but be amused that someone with a handle of "sniperong7" would play the French as a main defence to 1.e4. I don't recall a main variation of the French where Black fianchettoes his king's bishop
.
I don't see how the French competes with the Sicilian's flexibility, but then again you don't see how the Sicilian competes with the French's "super-solidity"...let's just say that they both draw the game