If it's "mainly movies" then keep the Infinity speakers.
You could also use the money from reselling the Paradigms to pay for a better sub like a Hsu or SVS which would really improve your HT. Just an idea...
Would it be overkill if I used the infinity's for the front and the paradigms for the rears? They sound nearly identical in quality, but to match, yes, I should keep the infinity. What helps me tip the scale is that the Paradigms arent shielded
How much do you think I could get for the Paradigms 3se? They in great condition. The modified sub works great, added the polyfill, stapled and shaped to my liking, and added spiked feet so that they can cut me when I lift it
The rears do about 10% of the work for most HT so why not? IMO the only time you need to timbre-match the rears is if you listen to a lot of multi-channel SACD/DVD-A music.