Now I totally want to tweak my casual W/B lifelink deck into something Modern-worthy. Sorin 2.0, Divinity of Pride , Well of Lost Dreams , removal, etc.
When playing Commander, before you add a card to your deck, you have to ask yourself: "Is this card better than Rings ?" If you play commander and don't have your deck[s] in the Decklist Compendium, maybe you should. Or if you're new or looking into the format, the compendium has some good advice for beginners as well as decklists.