I've found that to achieve a great distortion, you need one very important thing...

EQ pedal

You can get pretty nice distortion with many pedals and effects, but to get to the real cutting edge of a distorted tone you must have an EQ pedal.

You can mess around with many parameters in you D_pedal but to get those fine tunning tweaking details (like when you need that extra HighMidCrunch parameter) you will need a EQ.

And it's funny cause you really don't need to much distortion to get a pretty Heavy sound, really give it a try and you'll be amazed of where you can get tweaking an EQ (before or after the Distortion), and it's really fun.