To me a point source if well executed should sound more coherent with much more focus. I have no idea why anyone (except Al Porter) would go down this road. Instead of ten tweeters why not use just one?
Actually Dali Megaline have only one tweeter per channel, it just happens to be 7 feet tall, so yes it's a line source :^).
I like them a lot but also like point source speakers with Dynaudio, Kharma and Avalon immediately coming to mind.
Each design has advantages and there's probably white papers on the web explaining why each is superior to the other.
The obvious answer, there's no substitute for listening to every speaker that interest you and then considering room size and budget try to pick a winner.