sample tank and amplitube program newest version is free for download(only need register). only the sounds or effects need extra buy(free version include very few), but of course you can use that you get with Biab. I dont know which sounds in BiaB are add to 2013 release. I know there is a sample tank Expansion called Omnisynth 2. It is GM. It cost around 30$ if sold seperate.

I think biab 2013 very intresting, because the Demos sound much better and i hear that Omnisynth 2 in the GM demos on youtube sound really great.

If the new midi syles support sample sample tank sounds, i think is a very good idea.

Only what is not clear for me, if the biab sample tank sound library is GM Omnisynth 2. does somebody know this ?