What balanced dac would go well with topping a90?

So I recently got a topping a90 and now I want to also get a balanced dac to go with it. What would go well with it? I’ve been recommended the smsl su-8 and su-9, are these good and is there a big difference in the sound between these?

I’m currently using my ifi zen dac as a dac for it and get horrible ground loop noise even on low gain. If I go balanced does it eliminate ground loop noise or do I still need to get a isolator?

My budget would be 200€-400€.

Ended up getting the Topping D90 MQA version for 600€ and it sounds really good :slight_smile: