I have been trying to get my recorded TV (.ts and .jtv) to playback cleanly with RO+HQ (madVR), but it doesn't like MadVR. Now I have my TV recordings set to use EVR and everything else using MadVR, and it looks real nice.
That's basically what I do.
I do wish that I could add a conditional based on bitrate, though (maybe you can, but it isn't documented how). My main problem on the HTPC isn't actually with particular file types (TS in my case), it is actually with bitrates greater than 10Mbps.
Even with MKVs and whatnot, any file that has a bitrate higher than 10-11Mbps, I get a little stuttering with MadVR, so it would be nice to be able to base the decision on bitrate in addition to than file type/codec. FWIW, this only happens on my HTPC (Q9550 @ ~3.5GHz and an AMD 6870). My server machine is a bit more powerful and plays ROHQ perfectly fine without modification on those same files (it's a Core i5 750 @ ~4GHz with an older AMD 4850 GPU).
If you
can do this, I don't know what condition term to use.