I am pulling the trigger on a 2015 5K iMac this week on B&H Photo. I have a Dell monitor (2412M) that is currently hooked up to my PC via a DVI cable. I want to use this monitor with my new iMac. The 2412M has a display port connection. Should I: 1. Just keep my DVI cable and purchase the proper adapter to use with the iMac? 2. Purchase a Display Port cable and then also purchase the proper adapter to use with the iMac? Any advice is appreciated. Also, if anyone can assist with linking to the correct adapter/cable, just so I know that I am buying what will work, would be greatly appreciated. Thanks for any help you can provide!!