Given your response to overthemoon, I believe your route towards an upgrade is the right path. Purchase an amp and upgrade the preamp later. I have never owned an amp having the power you are looking for so can't make a recommendation. That said, as one that uses a SS amp with a tube preamp I can suggest that when it is time to upgrade your preamp you consider a tube based one. That combo may just be the ticket with your speakers.
Amp Search and Upgrade
So currently I have a Parasound Integrated, the Hint 6, that are driving my Dali Opticon 8. They are rated as a 4 ohm speaker with an 88 db sensitivity. I am looking to upgrade one item this year so I want to make it count. The integrated has pre-outs so I can adda 2 channel amp or a pair of mono blocks.
At this point would I be better off getting just an amp and using the Hint 6 as pre temporarily until I can afford a better pre amp or should I get both pre and amp at once? I'm thinking something used {hopefully) in the $4k range.
I only stream using a Bluesound Node 2i feeding a very nice DAC, an Aqua LaVoce S2, I also have a pair of REL T/7i subs.
Recommendations on what would pair with the Dali's and whether I should stick with the Parasound as pre please!