Available are...
1 Strike Digidesign
2 DFHS ToonTracks
3 EZ Drummer Toontracks
4 BFD Fxpansion
5 RDK2 (Reason with Reason Drumkits 2)
Depends what style and how you want to work.
Fast and easy 1 EZ Drummer 2 Strike
Fanatical control for seasoned drum dudes 1 DFHS 2 BFD 3 RDK2 (personal taste......go listen to all the demos)
Are you a drummer and want to trigger from an electronic kit? 1 DFHS
Do you already own Reason? get RDK2
They all work well with PT.
There is a new one coming..............
http://www.addictivedrums.com/
Lots to choose from!