I recommended the 12Mic for several reasons, because you didn't want the Clarett and didn't mention a price limit.
I thought that you perhaps might want more Mic inputs
- of the same high quality (transparent, high gain range, pad free design with high input level stability, etc), see also the technical section in the manuals and
- with the the same features (4 more instr inputs, Autoset, excellent phones output, also useable as line inputs)
as you have already with your UFX+, so that this would be a perfect match.
Also important to know that this RME product gives you features that you won't have with other products:
- high port density of 12 inputs which can also be used as line inputs and additional 4 Instr inputs
- high quality phones output
- Gain up to 75 dB for signals up to +18 dBu
- Signal-to-noise ratio >117 dB unweighted, >120 dB(A)
- 3x ADAT OUT
- MADI SFP / BNC (which gives you a higher range for placing the solution in the studio or even live)
- redundant power supply
- integrated routing matrix
- Word Clock
- Steadyclock FS (by this the ideal clock slave, A/D and D/A conversion being done with it's internal FS clock)
- remote controllable through Web browser and the new MIDI remote
- AVB readiness
- in the future (delayed by Corona): Auxdevice support like with the Octamic XTC, to be able so save/recall most important preamp settings in TM FX snapshots.
Of course you are free to take any other produt. Simply browse e.g. the Thomann or other shops, sort for price and look what device gives you the desired quality and features.
However, you will then find that you have to make a lot of compromises with the cheaper products compared to the 12Mic.
I just wanted to give you that on the way, in case you wonder why RME and why the 12Mic has it's price.
BR Ramses - UFX III, 12Mic, XTC, ADI-2 Pro FS R BE, RayDAT, X10SRi-F, E5-1680v4, Win10Pro22H2, Cub14