Do I really need separates?

Currently the main system is a Anthem Integrated 2 fed by a Sonic Frontiers SFCD-1 through XLO ref. Speakers are Near 50meII. Cables MIT MH-750 bi-wires. Would I really hear a difference if I replaced the integrated with tube separates from BAT or Sonic Frontiers. Also, will a 50 watt tube amp push as much current as a solid state amp. My wife has suddenly got the audiophile bug worse than me. She really wants tubes (I guess I do to) but we also want to hear an improvement over the current rig. The cd-player we both love as well as the speakers. I guess we are a little confused. What happened to the good old days when I didn't even have the money to consider all this. Or max price point for making the switch is about 5k. please can someone help?