There's even a free version that's quite useful. SSS is one of the great but little-known bargains out there. So much fun to just sit and play, great for composing or just mucking about.
I got to finally meet Tracy this past January - cool guy, and his wife Brenda is a sweetheart. David Baer and I hung out at his booth longer than we'd intended to. Tracy was plugging his newest product Renegade (also a favorite) but I kept nudging him and saying "show 'em Solid State Symphony". I think even he was surprised at the reactions he got from it. Everybody who saw and played with it was blown away. Shortly afterward, he raised its price (still a bargain at $59, but I'd suggest snagging it before he changes his mind and bumps it up further).