After the results on my LG M1921A TFT were far from being satisfactory (ghosts, shadows and distortions), I just swapped the monitors between Amiga and PeeCee.
My old 17" Belinea ray tube provides a decent picture based on the Amiga/Indi signals on DBLPAL. HighGFX (and most of the other stuff) works equally well, but I have to keep the low chipmem in mind.
The TFT's native resolution of 1280x1024 pixels proved to be better suited for my PeeCee. Though it's a TV/monitor the picture in any of the Amiga screens was problematic, except from maybe RGB-SCART.