I suggest you try an ARC pre-amp. If you can't afford a new one, try a used one. My SP6B is superb and will last a lifetime. I got it used for under $800.00.
If you have a local dealer, see if he or she can help you demo something from ARC in your system.
Remember, your ROOM is the most important variable in your system. Your dealer may be able to help you with this as well. If not, many on here can provide some advice.
Cheers!