Satiator - lulz not even worth it at the price point unless you are adamant that you want to keep the disc drive.
Phoebe/Rhea - just write it off because you'll never get one at cost unless you are religious in checking availability or are willing to spend 10X the price on eGay. Its file system is also archaic and has to literally have ALL games named "disc.img" or whatever extension. Each game has to be in a separate folder, and can be a pain to set up.
Fenrir - fairly cost effective solution, pretty good compatibility, easy to install, readily available for both M1 and M2 Saturns.
MODE: readily available (if I recall correcly), easy install best compatibility with Saturn, DC and PSX as well as file compatibility. Not that you are gonna get one and swap it between consoles constantly, but yeah.
Ive had all 3. Pheobe is nice, but a pain, Fenrir is less of a pain, MODE is my preferred way.
Only other issue with MODE is that if you want a clean install you need to get a bracket for it and it involves taking the saturn apart completely rather than just snapping shit in like Pheobe/Fenrir.
edit: My mode is just sitting in the cavity left by removing the drive, but the console stays closed 100% of the time unless Im changing shit, so its'not really that big of an issue for me.
Get a MODE.