I was looking into the 2245 VS the 2242 and went with the 2242... I think the 2242 in a 10 cu ft box goes a tad bit lower... Both options you can't go wrong with.
Both the 2241 and 2242 develop EBS alignments in large boxes. The 2245 doesn't have the shelf, and is as loud at 30Hz as it is at 100Hz. But the 2241 and 2242 are louder in the midbass. And the 2245 isn't available anymore anyway. As you said, they're all great subs.