When I posted my last entry I didn't give the OP much of a chance of finding replacement speakers, but on a lark I searched Amazon UK and found these:
http://www.amazon.co.uk/Pyramid-3070-2-Way-Studio-Monitor/dp/B000CSOJ2U/ref=sr_1_1?ie=UTF8&qid=1405900810&sr=8-1&keywords=Pyramid+3070
Not an...
The systems I referred you to are complete replacements; sorry I misunderstood too.
I you want to buy replacements, you have two choices: find the exact same Sony speakers (with the proprietary connectors), or find 3 ohm speakers and splice them in (this is not a horrible option as long as you...
I like Yamaha, so here's one in your price range:
http://www.amazon.co.uk/Yamaha-amplificatore-htr-2064bl-ns-b20bl-ns-swp20/dp/B005O08NVE/ref=sr_1_1?s=electronics&ie=UTF8&qid=1405774607&sr=1-1&keywords=YHT-196
Although I would push you to this for the speaker auto-calibration...