Dream itx am4 setup.. Least I think this will be reasonable
Processor
R7 1700
Graphics card
R9 fury nano (already have one that's a year old)
Memory
16gb G.SKILL 8GB x2 NT Series (have my reasons)
Hard drive
120gb SSD samsung preferred
Largest laptop standard hard drive
As for motherboard wish list
Am4/Am3 heat sink mount holes
3 pwm fan headers
2 standard ddr4 slots 3000 oc 3200
1 pcie x16 3
1 mini pcie for WiFi Bluetooth (able to upgrade in the future)
1 nvme
4 sata6
High quality Japanese capacitors
Ultra high quality vrm with proper heatsinks
Maaaybe rgb on the motherboard and headers for it not sure on this yet.
I'm hoping Asus makes a am4 itx due to using their Am3 itx since it first came out with a phenom II x6