Expected Mac Mini might be the best for eGPU setup!
Finally there are some rumors for Mac Mini also. Probably it will have 4 core intel 8th gen cpus (i3-8109u, i5-8259u & i7-8559u) and for high-end model we might even see 6 core options. I dream for a new Mac Mini w/ Kaby Lake G cpus but the chances are ridiculously low if we consider Apple.
Hopefully they bring back user-upgradeable ram but not sure about this also. Probably it will have fusion drive options, which will let us open it and upgrade with an ssd.
Like always Mac Mini should also provide thunderbolt ports (probably 2 thunderbolt 3 ports) and I think this makes it the best option for a Mac eGPU setup.
For Mac Mini you have to get a monitor in any case, and Apple also released its egpu system that let us think it won't stop here.
So, what do you think? New Mac Mini + Gigabyte Gaming Box might be the best small form factor Mac system.
That would be really nice, where are you hearing these rumours? I'd love an Apple TV sized Mac mini, maybe double height, space grey, that would be the dream. I'd kill for a desktop or HQ class CPU but thats prob too much to ask
2017 13" MacBook Pro Touch Bar
GTX1060 + AKiTiO Thunder3 + Win10
GTX1070 + Sonnet Breakaway Box + Win10
GTX1070 + Razer Core V1 + Win10
Vega 56 + Razer Core V1 + macOS + Win10
Vega 56 + Mantiz Venus + macOS + W10
First, a rumor appeared here including many Apple products to be refreshed this fall;
This guy is very well know for his accurate guesses. Then, there are some topics under Mac Mini section on Mac rumors forum.