Hello all. Im looking to explore solid state electronics again. I have a chance to pair my C4 with an M4. Now it is paired with a NAD 2400 . Both Yamaha pieces will need some work but are basically functional. Im a newbie at working in solid state. There is are also a couple CA1010’s on the market at a higher price, but restored or fully functional. Im wondering if anyone has experience with the two pre/power amp combos, versus the integrated. Speakers are Klipsch Heresy I or Canton Quinto 530 (similar to Braun or ADS). Ive been on the hunt for some ns1000 or 690’s but they never come up in my area.