Well personally i like Mogami/Myoko for the range and absurd firepower. One good salvo usually obliterates most squadrons.

It's only real downside is the inability to load anti ship ammo when used for AA.

Obviously the Worcester class CL.

http://hoete.paslog.jp/image/Worcester.jpg

Look at how many guns it has per side!
6x slots for dual 6",
5x per side for dual 3",
1x dual 3" in the front,
2x single 3"s in the back that can all fire

http://hoete.paslog.jp/image/CL-144Worcester.jpg

Best all-around AA ship is probably the Moltke.

Yamato and Super Yamato, they have the best AA platform

DD: Z99,Tsukikei.
CL: M Project,Emden,Mogami CL.
CA: Myoko,Mogami CA (Not the Hybrid) Moltke,P Project 1,Admiral Hipper/Prinz Eugen.
BB: B65 Project,Yamato,Super Yamato,Almost everything KM,Richelieu,Alsace,Charlemange.

I suck at AA but I have strong feelings for the P-Pro.

ah feelings for the P-Pro eh rehor? i can agree with you there it's a great AA ship. Even the D-Land can make a suitable AA platform as well, truth be told there are a lot of good AA ships in the game and BB wise some of the best are the H44, Amagi, Yamato and SY, the Alsace, Richelieu, Petropavlosk, moltke/mandel, Pensacola.....ect. but IMO the best one is the H44.

It has 8 slots per side and a good selection of AA to work with although it is quite fat but still it has a nice tight grouping of shots and very rapid fire AA if you pick the 88's the KM-40's are good too on it.

UK= emerald
US=atlanta
IJN= yammy/ SY/IJN BB6(holy crap i cant remember its name)
KM=emden/moltke
MN= who cares?

i wanna try AA on a midway:P