Shimano Stradic Ci4+ FB
Shimano's lightweight mid-range model. With the price and specs, it's easy to see why these are our most popular Shimano reel. The Stradic range has been around for decades and these have a reel reliability about them which makes them always a safe bet. These Ci4+ models are much the same as the Stradic FK, just encased in a lighter weight body. This can be a good or a bad thing, depending on the rod you choose to put one on. I, for example, found that I preferred the 3000 FK when matched with a 9' SSD rod as the extra weight actually balanced the whole thing up more nicely. So do consider the weight of the reels and your rod of choice before picking between the Ci4+ and the FK.
Ben's an idiot so hasn't added a full category run-down yet. We're sure he'll get on it shortly.