Lots of people don't like the Performa era, but I think they are great machines to collect. Lots of fun to play with them.
Right now, I have a black 5400, 5250, and 6200
All run great, and look very smooth
What I found out in the meantime, it's actually both. The Performa runs at 33MHz,
the DOS card is a 66MHz PC 80486.
How is the recent standing with your peripherals ?
But this is not a Mac... it is the platinum enhanced Apple //e... I have never see this machine in my life (only the old one without numeric keyboard).