Groove Matrix
Arpegiator
Midi FX
Track presets
Dimension
Psyn II
Alias Factor (this ones great for insant Bjork style lofi harps and music box sounds)
Audio file support with direct from disk sample streaming.
The ability to create custom acid files (ala groove clips).
Track Freeze
Multi time signature support
Excellent step and grid entry features
Excellent midi editing tools
Hey I wasn't even a P5 1.5 owner and all these features won me over.
I must stress though that Dimension is seriously awesome.
The sound quality and articulation is absolutely superb on many patches.
Infact in Australia prices are absolutely ridiculous for software (even worse for hardware).
I got P5 for $439 AUD.
I would probably have to pay close to that for Dimension alone with the sort of sound library it ships with.
Psyn II is seriously good also (damn nice filters and lots of routing options).
I'm particularly enjoying the FM and RM based possibilities at the moment.
It also excell's at custom synthetic percussion programming.
Definately capable of some "out there sounds".
I've since deleted Triangle II , Superwave P8 and PolyIblit from my VST folder since exploring PSYN II's possibilities.
Both synths have very good presence in a mix I might add.
Oh my God I'm sounding like a FANBOY .......
Somebody save me LOL.