I agree. You could still (re)use your current system as a standalone blu-ray player, and/or connect your actual speakers to the new AV amplifier, but I think that a new set of good quality (and not necessarily expensive) speakers should be a better option.
I thought of that too - but since Harmy says he uses his PC for most of the blu-ray playback, the current player/receiver is kind of redundant. The issue with his speakers is that, from what I can tell, is that they appear to have proprietary male plugs to attach to the back of the receiver. Whenever I see that I have not ever seen standard speaker wire running to the speakers. That would cause me to worry about simply cutting the plugs and running these speakers on a new receiver. I’m with you - I would get a new set of speaker as well and use the sale of the old system to offset the cost.
The end results will be a much better system that is far more customizeable and upgradeable for when future hardware changes are needed.