If eveything in your system was the same and the new amp made the system sound forward and bright, chances are new cables and source wont provide enough adjustments to make you happy. I personally find that when I dont immediately like a new component I try to cut my losses and move on. Otherwise you could end up changing everything including your speakers and still not find what you need. This has happened to me many times.
BTW spendor are a good match with Hegel and also Croft amps.
Good luck.
BTW spendor are a good match with Hegel and also Croft amps.
Good luck.