I would only go for the Ci4 if you can find a good deal on it, or you're going to balance it off well with at least a $100 rod.
I use a 3000 Ci4 for saltwater use and it's an AMAZING reel, but I have it paired with a great rod, and I got the reel for $160 on ebay. (The guy thought it was a 'CL4' so no one found the listing )
If you get the IMX you can easily put a sub $100 reel, of there or even get a standard stradic for around $120 on ebay and have a great setup.