Assuming this is sonically the same as the P362, I don't understand why Infinity doesn't spend a little time designing some inexpensive strategic cabinet bracing and increase cost accordingly. They do everything else so well that the cabinet resonance becomes a glaring design flaw.
For their price they are a good recommendation as budget floor-standers, but if you got rid of some of the cabinet resonance in the mid to upper bass range, they would really be the one to beat!
I guess the good news is, for someone on a budget - they could buy a pair of these, a piece of mdf, liquid nails, and borrow a jig saw to add bracing and end up with some outstanding speakers without much investment.