EZdrummer 2 with the Latin Percusion set.

In Sonar, Dimension Pro, TTS 1 and Soundcentre are all potential sources.

I still use the Luis Conte kits in Kitcore in preference to EZ Latin. Unfortunately it's hard to recommend Kitcore at the moment due to the debacle surrounding the release of Drumcore 4. (12 months on from taking pre-release orders we are still waiting)

Chromaphone by AAS is my favorite VST for percussion.

robert_e_bone
I really like Battery 3. BUT, I just a couple days back took advantage of a GREAT deal that had been posted in the Deals forum, where by making a $25 donation to be split between 2 good music charities, I then was awarded a free FOURTEEN GIGABYTES PERCUSSION LIBRARY FOR KONTAKT
 
Please excuse the caps, yeah I was that excited.
 
This library is amazing, and has the most in-depth percussion sounds I have ever seen.   Mallets, brushes, all kinds of different sized cymbals, flourishes, you name it, it's in there.
 
Here it is:
 
http://forum.cakewalk.com/FindPost/3130038
 
FABTABULOUS deal - by far the best $25 I have ever spent on anything related to music.
 
Please note that it does take up to about 24 hours for them to process it all and send you the download links.  Also, there are instructions for the decompression and installation - FOLLOW THEM.
 
Bob Bone
 

 
Sounds like an absolute bargain, I just donated. 

I own Battery, AD2, and EZ Drummer and I would say EZ Drummer has the best add-on for this stuff. Though that Kontakt charity thing mentioned above sounds interesting.
 

Because of this thread I opened up Dimension Pro 1.5 for the first time in a long time. Some of the sounds are decent on their own, and if run through an effects chain can be made into very nice sounds. A while ago, I had downloaded sforzando and have grown to prefer this as it visually shows what keys are mapped and which are not for programs. There is also a "ARIA Free Sounds" at the extreme bottom of the download page, and Garritan has a "Basic African Percussion" that is more capable than I expected. Sforzando will drill into the DP Multisample directory by default and is a bit easier to run through sound banks to test drive them (there are percussion-specific programs within DP as well).

I repeat that that 15 GB percussion library I got from giving $25 to 2 worthwhile charities sounds fabulous.  (was a single donation - they split the $25 between the two charities)
 
I highly recommend it - I have never had so many cymbal 'flourishes' as I do with this new library, and I haven't begun to scratch the surface on it.
 
Bob Bone