Dump the loudspeakers, the amp and the preamp. Stretch you budget a little and get KEF LS50 Wireless IIs. I agree with all those who stated that your current system is mismatched. I even agree with those who say your Omegas are a real good loudspeaker. I just think that getting a good sonic match for the Omegas will give you a somewhat complicated system. The KEFs will produce high quality sound while keeping it simple and allow for future upgrades. New they are $2800.
BTW, how did you come about picking the Omegas?