The Q5/Q10 will play TS and M2TS files fluidly and without and trouble.
Is not true, not all files M2TS fluidy and without trouble. It depends on how they were created as.
1920x1080 CABAC CBR 20Mbit 4:2:0 Profil : High@L4.0 Intra: 4x4 : not fluid, many freeze and other trouble.
All files with other combinations but with CABAC and CBR is not fluid.
The only combination for a fluid M2TS i found is:
1920X1080 CAVLC VBR 17-19Mbit 4:2:0 Profil : High@L4.0 Intra: 16x16.
I did a lot of testing with many combinations and I found this solution, i work with Edius 6.07 and create files with the camera AVCHD Panasonic AG-AC90.