If all you need is a Saturn hookup start with the Rad2X cable. It's the cheapest option that will give you a clean 480P RGB signal to HDMI without adding any lag. IF you decided you want higher resolutions you can always buy a more expensive OSSC.
https://www.retrogamingca...80P-CABLE?search=Rad%202xThe RAD2x is the perfect plug and play low latency solution for connecting your PAL and NTSC Sega Saturn to a modern flat screen television This is a based on the same technology used in the RetroTINK2x with the added bonus of supporting RGB video, and, unlike other all-in-one HD cable solutions the RAD2X correctly interprets the the 240p signal correctly and processes this as a progressive scan image and then line doubles this to 480p. This also benefits from a smoothing feature to enhance 3D games.
Requires a Male HDMI to mini C HDMI cable (not supplied). However we sell a 1 metre cable here.
Specifications:
Formats: 240p/480i, 288i/576i, NTSC / PAL
Input: RGB internally converted to YPbPr
Built-in anti-aliasing LPF
Output: miniHDMI at 480p/576p (line-doubled mode)
Default 4:3 Aspect Ratio
Latency: About 53 microseconds
Audio: 24-bit stereo
Optional smoothing filter with mechanical ON/OFF switch
No need for external power supply*
Fully shielded PACKAPUNCH cable from the console to the RAD2X