I've been playing Graves, i have 74% win rate 24W 7L with him so far im at 1500ish atm, i most of the time carry my team, and i decided to play AD Carry only from now on, but im curious at how good the new ad carry are, Ex: Draven Varus i also havent played kogmaw MF nor caitlyn, the ones i owe are tristana vayne ashe ezreal and urgot (ad caster)

Can anyone tell me which ADC to get? Draven/Varus/Koggie/MF or Caitlyn and why?

There is no best AD carry.

If you like a strong early game, pick MF, Draven, Caitlyn.
If you like a strong late game, pick Caitlyn, Trist, Kogmaw.
If you like a strong mid/all around game, pick Graves, Ezreal, Corki

I see no vayne in that list.

At the moment the "best" carries are considered Vayne, Corki, Ezreal, Kog'Maw, and Tristana. But honestly all of the carries are even and bring something different to the team. Take Sivir for example; her ultimate make all of your team's movement and attack speeds faster. She also have a shield that blocks incoming spells on herself. Ashe has seriously devastating slows and a stun.

Only one I don't really like is Miss Fortune.

Early game? I'd say Caitlyn, Miss Fortune or Draven.

Mid game? This is pretty much where Corki, Ezreal and Graves come into their strongest point.

Late? I'd say Vayne, Kog'Maw and Ashe are the scariest late game carries.