INTEGRA DTR-7.2 Vs EMOTIVA UMC-1 Vs OUTLAW 990 PRE


I have an outlaw 770 power amp. and I am using my Integra DTR- 7.2 as a preamp. My left and right front speakers are Paradigm Studio 100 v2.
I would like to know to get the best out of my system should I get the Emoyiva UMC-1 or Outlaw 990 or just using what I having wich is the Integra DTR-7.2? Most of the time I use my system to watch movie.
Any help will be greatly appreciated.
Thank you.
calicali92056