Well, for any type of nostlagia, best thing I can reccomend is patiently wait for MISTER FPGA modules, to have all the consoles you used to play... and get a Everdrive for your respective Catridge Slot based systems.

You get clear picture and sound, can use the original controllers, it's pretty dope.

As for your CD based systems, I would reccomend getting one of those Disc Tray emulation contraptions with the SD card. Then you can at the very least keep your console and it's original controllers.

Also, If you want the best experience and best way to play all your consoles...
I highly suggest you buy this projector... I reccomend it to all my friends.
I bought mine for 200$ from Facebook Market place!
https://www.alphr.com/benq/benq-mw851ust/31879/benq-mw851ust-review/

It has all the hooks you will ever need to play all of your retro consoles.
Because it's DLP it handles native analog signals perfectly.. with no input lag.

The lamp lasts forever, especially if only used for gaming. I play my N64 on this bad boy all the time... with the simple RCA cables (Composite) and the image looks Beautifull, because the projector was made this in mind.... it's not a secondary post processing thing, it was built for this.
I have a HDMI HUB for my newer consoles and PC that is hooked up to it (Note: It's 120hz refresh!!!!) and I have a HUB for all my Composite consoles and it even has VGA! Don't ever listen to VGA Haters... trust me when i say it's number one for a projector. I have my Xbox 360 hooked up via the VGA (real original cable... not some adapter) and I run all my consoles in 720p Mode.

A lot of people don't know that the PS3 and Xbox360 generation of consoles actually run better in 720P Mode.

God I love talking about this stuff.... Don't need line doubler... you just need a great DLP projector made from the era of your gaming. Don't buy a 4K or cheap chinese projector either. Plus... the last thing that is great.... is this project is Ultra short throw, so it can be put up against the wall and is not loud (as long as you remember to clean out your filter every couple of months.... especially if you have pets).