Blaze DTV is pretty good with my compro t200 card. Not as fast at channel searching, but it supports hardware deinterlacing (avivo/purevideo) so looks a lot better then the stock compro software output.
nerovision looks nice too (hardware deinterlacing) , but isnt very compatable with the card. I quite like vista mediacentre with powerdvd decoder (again hardware deinterlacing with avivo) but hard to navigate without compataible remote.