The Sony pre is the WORST item currently in your system. If I had any money, that would be the first to be swapped out.
Plenty of choices available, The cheapest I would seek is a Hafler DH110, Used only, cost about $125 to $175. A nice preamp, budget priced ,and MILES better than that Sony.
Other folks will suggest other stuff... This is my recommendation. And maybe a line conditioner for all but the amp. (adcom ACE 515 or Monster 2000 at $110 used are about right for your budget.
Plenty of choices available, The cheapest I would seek is a Hafler DH110, Used only, cost about $125 to $175. A nice preamp, budget priced ,and MILES better than that Sony.
Other folks will suggest other stuff... This is my recommendation. And maybe a line conditioner for all but the amp. (adcom ACE 515 or Monster 2000 at $110 used are about right for your budget.

