Soft sequencer like JD-Xi/Monologue?

[Lava]

I have a Roland JD-Xi, and I have played a Korg Monologue, and I really enjoy the way their sequencers work. I currently use Tracktion, and I technically have most of the capability of those hardware sequencers available to me in that application, but I'd love to find an all-in-one single-interface VST version that I could run in Tracktion and use to control both VSTi's and external hardware. Preferably with a modulation track.

I've combed the plugin database for sequencers, and a few look pretty intriguing. I'll be testing out what I've found over the next week, but I thought I'd start a thread in case there was something obscure out there that I might be missing? Do you have any recommendations?

[VariKusBrainZ]

What can these Roland sequencers do that attracts you?