hi,

i've recently bought a technisat digit mf4-s and i'm not very satisfied with it.
it is simply impractical because it has only got one favourites list which is limited to 999 channels. the navigation is also limited to "all" "provider" and "favourites" (no alphabetical nav). especially with a 3-sat system these limitations can be a nuisance. i'm also using a matrix rbn with it and 1/3 of the time the stb crashes whilst initializing the cam. can't tell you about t-rex, but it might be the same problem.
my advice: get a technomate 1000-series or smth similar. they are cheap, patchable and have an embedded conax cam (at least i think)
hope that helps...

tschuess,

marty