I'd go the second one with a small change.
Dayton Audio RS100-4 4" Reference Full-Range Driver 4 Ohm 295-378
run that as the midrange. it is a much better driver.
you also want to keep the midrange an tweeter close, ie both in kick or pillar. The dayton 4'' would stand on it's own but would be more laid back and less bright up top. It will roll off a lot harder and faster. The human ear can only process up to 20khz, give or take, but that doesn't mean that your loud speakers only need to play that high. I think b&W's diamond tweeters play up to 100khz. The higher the driver will play the more full and detailed it will play. I like my highs laid back and subtle, but I know what you have been running for tweeters an I don't see a wideband/fullrange working in your application.
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