Just depends on what you want to do and what you throw.
While they might be similar in specs, the Amistad and HCJ are very different rods. First, the Amistad is a full power heavier and noticably so. The power is much higher in the rod. Both are heavy and fast, but the amistad is heavier and faster. For what you described (1/4-3/8 plus plastic) the HCJ is a great rod. I wouldn't use it to throw into heavier cover like laydowns and pads, but for fishing the edges of that or into milfoil and similar grasses its right on the money. The Amistad is what throws into those things. I would also say that the Amistad starts at 3/8 plus plastic for me, though a quarter works also depending on the plastic and the line you're using (I've found braid needs a little more weight while mono doesn't).
I love the swim jig rod for swim jigs and lighter texas rigs. The head turner is a great rod for lots of things. A new to me (and the lineup generally) that I think I'm going to love this year is the big bait rod (7'9" 1-5 oz). I picked it up for 6-8" magdrafts and 5-7" hard swimbaits. It flings a 6" magdraft into tomorrow in the yard so its going to do what I want there, but I think it would be another option for throw a half ounce plus plastic into some slop (like I do with the amistad). I'll do a better review in the falcon rods thread after I've fished it a bit.
If you could only buy three rods (and multiples of those rods) to outfit an entire boat, the swim jig, head turner, and amistad wouldn't be a bad set. If you wanted to hit the highlights of the falcon lineup you'd be there. If there is something you do or fish that is more specific, then there are some cool rods in the lineup like the finesse jig (finesse jigs and lighter topwaters), eye crosser (frogs and 3/4 oz bladed baits), and the deep runner (6-14' crankbaits).