Have tried a few IAs namely Marantz PM8006, CA Azur 651 & Marantz PM6006 , loudness was never an issue with any of them even while I was driving a Dynaudio Emit M20 (rated at 4 ohms @ 86DB). I moved to a separate's based setup and the experience has nothing but rewarding & if you are going into wanting to tune few things as per your liking then there is no better way then separates. I would suggest you to start with getting an AKM/R2R DAC if mids being smooth & lush is important to you & Indiq Saptak Power amp which is quiet neutral (so your initial chain determines how you want the sound signature to be) and then ultimately add a streamer (if you feel the need for the same) & a preamp.
Also on a general note depending on how flexible your budget is or you are willing to go in a phased manner , I think the below is what I would recommend to aim at from a chain perspective
Speakers - I have demoed the Qacoustics 3050i , while they are certainly good for the price but taking your budget to about 90k-1L you get many good options. XTZ 95.44 ,XTZ Spirit 11, Qacoustics Concept 40 , KEF Q750 & Indiq Platinum Achal. You can read user opinions online about all of these, however audition would be the best way to determine which one suits your playlist better ( I personally prefer the Platinum Achal from this list , having auditioned all but the Concept 40). Trust me all of these will be a good upgrade over the 3050i , the 3050i are no slouch either and should serve you well till you feel something is lacking or are ready to upgrade. However dont base the rest of your chain on the 3050i if you ever have plans of upgrading
Source - You can use a PC/Laptop or buy a dedicated streamer for this function. Lot of options are available in the market at different prices ranges and you can evaluate them when you decide to goet one
DAC - You can go for Delta-Sigma DACs (based on AKM/ESS) or R2r DACs. Generally (though very good implementations can take care of this) AKM DACs are known to be velvety with smooth sound, ESS are little bright & R2R are warm, with beautiful mids and slightly rolled off treble. I personally prefer R2R dacs over the others. If you are into DIY then the AD1862 sound really good and worth considering, else Denafrip Ares II also is equally good.
Preamp - A Class-A SS combined with a tube buffer seems to be the best option here , although you can also go for a tube pre from LYRITA/Acoustic Portrait/Schiit too. I think a good preamp bodes well for the chain , having tried running my chain with & without a preamp the differences in stage, imaging was very pertinent.
Poweramp - A class AB poweramp which doesnt add any color to the signature would be perfect in this scenario. While most of the imported class AB power amps are quiet expensive , Indiq Saptak comes for 89k and sounds better than any of the IA i have tried out.
I am unlikely to move away from seperates until and unless I move to an active setup.