I like (and sell) the simple SS Loophole sling (and the new enhanced version) from Shadow Tech (the guy that makes the Hog saddle). Its inexpensive, simple doesn't have a cuff (since I never use one anymore), and just works well. Not heavy metal buckles, no bungees etc. You can buy one here:
https://www.bisontactical.com/produc...loophole-sling
It costs all of $39 - one of the best values to be had in precision rifle gear ;-)
Here is the enhanced model (two buckles instead of one):
https://www.bisontactical.com/produc...loophole-sling
I have used a Rifles Only Sling, USGI Sling (old school cuff sling), the Tactical Interventions Quick cuff (which I like for a cuffed sling) and bunch of others, but I really like the simplicity of the SS Loophole.
I haven't tried Tom's sling (Armageddon gear) but he makes good stuff, and Tony also makes some great slings (I have used the Biathlon sling - which I like if you want a two shoulder sling).