This is going to get fun
I'm working currently in 4 PC projects:
PC386/25 --> ISA/ IDE - DOS6.22
PC386/25 --> EISA / SCSI - DOS6.22
PC486 DX2/66 --> ISA / IDE - DOS2.22
PIII/550 --> ISA / AGP / PCI / IDE - WIN98SE / DOS6.2
in paralel I have other projects in the Pipeline
Spectrum 128 Toastrack (DIVMMC....)
Amiga 500 (Gotek, Vampire...)
Atari 520ST+ (Gotek, Satan...)
Original IBM AT
I think I'm going to post the progress in separate posts.. my focus is a combination of period-correct (no AWE64 in a PC386 for example) but using modern technologies where it makes sense (SCSI2SD, Gotek, IDE DOMs....)
Emulators, FPGAs, DOSBox and stuff is good... (I use them extensively), but nothing beats the real thing..
It's also funny to setup again ancient hardware (i had to remember again how to pull CPUs from LIF sockets, now that everything is easy-peasy with ZIF sockets..)
It's also amazing to revive old games without emulation or hacks.. like for example Wing Commander does not run on hardware quicker than 386D

33 or PCI hardware is not really compatible with DOS games and so on...
It's an amazing world, probably wider than retro arcading / retro consoling together...