I have a 24" Dell monitor that's currently hooked up to my MB. I'm thinking about selling the MB in favor of an iMac. My initial intent was to sell the MB and the monitor and use the funds for a 24" iMac (probably a refurb). However, I'm concerned about getting as much for my Dell as I'd like, so the thought crossed my mind to sell the MB and replace it with a low-end 20" (maxed out) and then connect it to the Dell. Honestly, I don't need any more than the space offered by the 24". I'd kinda rather not have THAT much monitor space on my desk. But I presume I could get used to it. Anyone have any thoughts?