After great advice by Harry Page on pushing PixInsight's DBE tool to the max I reprocessed my M33 with some interesting results!
Here in edit 4, I darkened the sky a bit, and upped the red in the Ha regions. Then I used PixInsight's DSE - Dark Structure Enhance scipt - a wavelet function to make the dust more interesting, and the galaxy itself then got a dose of unsharp mask in photoshop.
This is 6h 15m total exposure. 5 min subs.
Orion 8"RC at f8/1600mm
SW ED80 and Lodestar guiding
Nebulosity 3.0 Capture
PHD Guiding - dithered
AstroArt Preprocessing and Stacking
PI and PS CS5 Edit