Since you are wanting to avoid the impression of exploiting any one established servicemark held by various 'Rams' companies, I would eliminate any mention of such companies or links to their websites. You might create a webpage regarding the animal (a ram) and post a statement on your site asserting all rights, in their entirety, to the "Rams.com" domain name. The statement would include a disclaimer that reads something like: Rams.com claims no affiliation with or connection whatsoever to any other website using the second-level domain: "Rams".
My opinion on the resale value of Rams.com would be mid-XX,XXX or higher.
Good luck!