I lived with such a system for a number of years with a 52 managing a NAT01 and CDS.
I did not bother to play around with Snaxo settings relying on my dealer’s experience.
I now have a NDS to replace the CDS and run Ovator 600s, which I let my dealer set up. I’m still smiling …
SBL’s should be a good shout as long as you find a good pair.
I ran mk2 sbl’s in active for quite some time and sounded great and only just removed them from my system as i found some active S600 speakers that i am now using.
But for the price the Sbl’s go for then they are a bargin and as long as you place then near a solid rear wall they will sound great
I ran mine on a snaxo 2/4 on a high cap for most off its life that was set up for the sbl’s and was serviced which gave good results and is a must if you want to get the best from them.