I have only my mobile with me. Less text, but more plain facts would be preferred at the moment ;-) It's much work for me at the moment to type this all with 1 finger on a small smartphone screen.
Some things you still did not answer, so it's not clear to me whether it makes sense to propose a different solution to you where everything can be routed in one TM FX instance.
1. You didn't answer whether it would be worth for you or not to look for a different solution to have all i/o ports within one TM FX instance. Currently you have 3 cards = 3 TM FX instances and you can not route across the three instances.
2. For me it's still not clear how many ADAT and analog ports you need.
Therefore I asked you to answer how many adat in and out and how many analog ports in and out you need.
3. You did not clearly answer whether you want or need wc, midi, etc. You simply say that you have it now with the three cards, but not whether you want or need it.
Therefore I have currently no clear picture what you really need.
4. Without knowing #1 and what budget you have for new audio cards I have no clue whether it makes sense to investigate further.
In regards to the 5y old cpu that you mentioned, it still costs new around €327 if you do not want to buy from Poland (which you shouldn't do). If you are willed to pay around € 325 for a CPU then you should definitely look for more current CPU's. The reason is that the old cpu's do not really fall high enough in price if you buy them new. Then you better look for more recent models and get by this more bang for the buck.
For that or a little more money you get current products that perform much better. Ie this one with socket 1151 https://m.cpubenchmark.net/cpu.php?cpu= … mp;id=3098
Look at the passmark High End CPU list. There you see the ranking and the price.
Stick with Intel CPUs for lower latencies inside of the system.
I saw at least 2 Intel CPUs between €300-400 (6 and 8 core) that perform significantly higher at same or a little higher cost.
Also higher single thread performance which could be interesting for your applications as well in terms of VST and VSTi's.
By this you can also get more recent mainboards with more up to date usb ports as I said ie for backup purposes
In terms of mainboard you need to look on your own as it is not foreseeable whether it works well for audio or not. I can only recommend the HW that I use where I know that it works. But I think you don't want to spend much money for a ~2015 Xeon based system where cpu costs nearly €600 and mainboard €280.
X10SRi-F, Win10 Pro 1909, Cubase, UFX+, Octamic XTC, ADI-2 Pro FS BE/R BE, RayDAT, ARC USB