Do exactly what you want to do all the time. I run my dvd player and subwoofer into my Mapletree Line 3 tube preamp and have no problems. Watched Van Helsing on Friday night and was great sounding with lots of explosions, interesting noises, lots of low end rumbling. Also love good music movie dvds like Kill Bill or Kissing Jessica Stein. Would love surround just for movies but its pretty darn good with just two monitors, a sub, and my $150 Toshiba dvd player IMO.
David