Ideally you’d push it up to at least 352/384k (and the higher the better), why limit to 88k? Push that noise way out so its reflections don’t alter the audio band.
I’m a fan of poly-sinc-lp when I need to mellow things a bit. ext2 is like a high voltage charger and is great for mid day stuff. I find sinc-m to also be quite a bit softer/mellower vs ext2.
Ext3 and sinc-mx are both quite good but ext3 is very demanding on cpu and I’m limited there for rates beyond 768k.