I'm skeptical that an interest in Suh means they necessarily are looking for the top available DT. I think that the Rams are going for Suh because he's a dominant player who is unexpectedly available at a likely lower price than could have been expected. When rare opportunities come along, you at least take a look at them. I think their plan initially was a NT, an ILB, and if there were a decent one available an OLB. But Suh would give them more pass rush in a way that just wasn't available this free agency.
Just like when Eifert became available they bid on him, but apparently haven't bid on any other TEs. You make exceptions for hugely talented players.
