Only a few hours in but subjective first impressions: while the 530 is pretty flat to 5k, my IL-10 has noticeably less energy in the 1500-5000k range so at first listening I was taken aback how more laid back it sounded. One gets used to it but I think I prefer the more zippy and more detailed 530 presentation there but it's just a first impression. Bass seems more articulate on the Infinity which I do prefer. I'm hearing information from outside the L-R boundaries of the IL-30 which I don't recall hearing with the JBL (on the Roches first album). I'll have to check back on that track with the 530.
Here's the Anthem Genesis measurements with my two LSR310s subs. At this point I've just applied room correction to 400hz and a little bass boost with 70hz center. (not shown). While I can't compare to the Revel M16 I will say they're the best $85 speakers I've heard.
Interesting impressions. While I had the 530s I noted that the bass had obvious limits and they worked best mated with a subwoofer. They had satisfying bass but there was a lot of port noise with certain tones and it was significant at levels exceeding what I'd call casual listening. The center image of the 530s was effortless. I tried them toed in and out and they still presented a strong center image thanks to the horn. I can't identify the specific frequency range that the IL10 had trouble with, other than to say most bookshelf speakers have trouble in this area which can result in a "bloom" effect with certain material (higher male vocals, lower female vocals, piano). It sounds like upper midbass, lower midrange area. The 530 did a better job of handling that material without "blooming".
While I did find the sound space presented by the 530s to appear larger than the speakers themselves, the IL10s seem to handle this differently. The pin point location of instruments and vocals is less focused with the IL10 and wider. They are definitely a laid back speaker. I'd call the Infinity IL10 a "sultry" speaker. They're an easy listening speaker. I will keep at least one pair of them indefinitely. While I appreciated the capabilities of the JBL 530s I did not keep them. I'm very happy with what I have now.