THE synth that gave us the most recognizable sequence.
The XILS 3 has convinced me that next to the likes of Arturia and GForce, XILS-labs makes some of the best software synth emulations. At launch, the preset sounds just blew me away and I was even more impressed that it worked flawlessly on my 5 year old iMac Intel Core Duo processor.
The XILS-lab website also offers some great video tutorials on how to use the sequencer and other modules. So if you're looking for that classic Pink Floyd On The Run sound, this is the one.