iMac + Fusion Drive?

Recently, I bought my first Mac (a 2013 MacBook Air) and fell in love with OSX. For mobile I'm definitely an Android person, but for computer hardware and a desktop OS I'll definitely be sticking with Apple. My husband and I are planning on getting the 27" base model iMac for our house. From those of you who bought one (or anyone with an opinion, really) would you recommend paying the extra $250 and getting the Fusion Drive? Obviously I'm used to the SSD in the Air, and I think for a long-term computing solution it's probably worth paying the extra cash. Any thoughts? Any other upgrades you'd consider absolutely necessary?