RetroGaming

I don't have a lot of space for consoles and cartridges, or money for consoles and cartridges but I do have a decent computer hooked up to a TV. What's the best way to get an authentic experience via emulation? Here's what I have so far:

Retroarch Settings

• HDR enabled (cant tell if it actually helps)
• Run-ahead enabled
• Mega Bezel shaders
• Retrobit saturn controller (having trouble getting configured but has an excellent dpad)

Emulators/cores:

• NES - Mesen
• SNES - bsnes
• Jaguar - Bigpemu (need to configure shaders)
• Megadrive/CD/32X - Picodrive
• PSX - ??? Swanstation?
• Saturn - Beetle Saturn
• N64 - Mupen64plus

Thing I need to work on:

• Tweaking shader settings as the defaults are very dark
• Configuring retrobit controller to work with Steam big Picture (how I launch Retroarch) and retroarch seamlessly
• Possibly finding a Big Box theme that is focused on original artwork and not garbage

Any advice/pointers? My goal is to eventually have a "pick up and play" setup possibly with different 8bitdo/retrobit controllers for each system.